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17900970680 = 2354877971153
BaseRepresentation
bin10000101010111110…
…110010001010111000
31201012112211112100002
4100222332302022320
5243130122030210
612120143532132
71202413511615
oct205276621270
951175745302
1017900970680
1176566a424a
123576bba048
1318c3869858
14c1b60d50c
156eb8464a5
hex42afb22b8

17900970680 has 64 divisors (see below), whose sum is σ = 40445576640. Its totient is φ = 7130529792.

The previous prime is 17900970673. The next prime is 17900970683. The reversal of 17900970680 is 8607900971.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17900970683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15524984 + ... + 15526136.

It is an arithmetic number, because the mean of its divisors is an integer number (631962135).

Almost surely, 217900970680 is an apocalyptic number.

17900970680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

17900970680 is an abundant number, since it is smaller than the sum of its proper divisors (22544605960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

17900970680 is a wasteful number, since it uses less digits than its factorization.

17900970680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448 (or 2444 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 47.

The spelling of 17900970680 in words is "seventeen billion, nine hundred million, nine hundred seventy thousand, six hundred eighty".

Divisors: 1 2 4 5 8 10 20 40 487 797 974 1153 1594 1948 2306 2435 3188 3896 3985 4612 4870 5765 6376 7970 9224 9740 11530 15940 19480 23060 31880 46120 388139 561511 776278 918941 1123022 1552556 1837882 1940695 2246044 2807555 3105112 3675764 3881390 4492088 4594705 5615110 7351528 7762780 9189410 11230220 15525560 18378820 22460440 36757640 447524267 895048534 1790097068 2237621335 3580194136 4475242670 8950485340 17900970680