20183516856 has 24 divisors (see below), whose sum is σ = 54663691680. Its totient is φ = 6727838928.

The previous prime is 20183516851. The next prime is 20183516861. The reversal of 20183516856 is 65861538102.

20183516856 is a `hidden beast` number, since 2 + 0 + 1 + 83 + 516 + 8 + 56 = 666.

It is an interprime number because it is at equal distance from previous prime (20183516851) and next prime (20183516861).

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×20183516856² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20183516851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 140163240 + ... + 140163383.

It is an arithmetic number, because the mean of its divisors is an integer number (2277653820).

Almost surely, 2^20183516856 is an apocalyptic number.

It is an amenable number.

20183516856 is an abundant number, since it is smaller than the sum of its proper divisors (34480174824).

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

20183516856 is a wasteful number, since it uses less digits than its factorization.

20183516856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280326635 (or 280326628 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 20183516856 in words is "twenty billion, one hundred eighty-three million, five hundred sixteen thousand, eight hundred fifty-six".