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17920136078 = 2131934877333
BaseRepresentation
bin10000101100000111…
…111001001110001110
31201020212220020022122
4100230013321032032
5243200023323303
612122110412542
71203035433455
oct205407711616
951225806278
1017920136078
1176664a4519
123581501152
1318c781a120
14c1dd9bb9c
156ed37ee38
hex42c1f938e

17920136078 has 32 divisors (see below), whose sum is σ = 29161626816. Its totient is φ = 8209963008.

The previous prime is 17920136071. The next prime is 17920136089. The reversal of 17920136078 is 87063102971.

It is a super-2 number, since 2×179201360782 (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17920136071) 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, 2440100 + ... + 2447432.

It is an arithmetic number, because the mean of its divisors is an integer number (911300838).

Almost surely, 217920136078 is an apocalyptic number.

17920136078 is a deficient number, since it is larger than the sum of its proper divisors (11241490738).

17920136078 is a wasteful number, since it uses less digits than its factorization.

17920136078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8028.

The product of its (nonzero) digits is 127008, while the sum is 44.

The spelling of 17920136078 in words is "seventeen billion, nine hundred twenty million, one hundred thirty-six thousand, seventy-eight".

Divisors: 1 2 13 26 193 386 487 974 2509 5018 6331 7333 12662 14666 93991 95329 187982 190658 1221883 1415269 2443766 2830538 3571171 7142342 18398497 36796994 46425223 92850446 689236003 1378472006 8960068039 17920136078