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20011861360 = 2451103226789
BaseRepresentation
bin10010101000110011…
…001100010101110000
31220122122211212222101
4102220303030111300
5311441014030420
613105431350144
71305625005061
oct225063142560
956578755871
1020011861360
11853a1a06a7
123a65b22354
131b6bc9b7aa
14d7bad2568
157c1d1060a
hex4a8ccc570

20011861360 has 40 divisors (see below), whose sum is σ = 46569965760. Its totient is φ = 7997452032.

The previous prime is 20011861357. The next prime is 20011861409. The reversal of 20011861360 is 6316811002.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×200118613602 (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25155 + ... + 201634.

It is an arithmetic number, because the mean of its divisors is an integer number (1164249144).

Almost surely, 220011861360 is an apocalyptic number.

20011861360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011861360 is an abundant number, since it is smaller than the sum of its proper divisors (26558104400).

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

20011861360 is a wasteful number, since it uses less digits than its factorization.

20011861360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227905 (or 227899 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 20011861360 in words is "twenty billion, eleven million, eight hundred sixty-one thousand, three hundred sixty".

Divisors: 1 2 4 5 8 10 16 20 40 80 1103 2206 4412 5515 8824 11030 17648 22060 44120 88240 226789 453578 907156 1133945 1814312 2267890 3628624 4535780 9071560 18143120 250148267 500296534 1000593068 1250741335 2001186136 2501482670 4002372272 5002965340 10005930680 20011861360