20116856475264 has 128 divisors (see below), whose sum is σ = 53738124148800. Its totient is φ = 6667708686336.

The previous prime is 20116856475263. The next prime is 20116856475301. The reversal of 20116856475264 is 46257465861102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×20116856475264² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20116856475263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65429607 + ... + 65736345.

Almost surely, 2^{20116856475264} is an apocalyptic number.

20116856475264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20116856475264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26869062074400).

20116856475264 is an abundant number, since it is smaller than the sum of its proper divisors (33621267673536).

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

20116856475264 is a wasteful number, since it uses less digits than its factorization.

20116856475264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307722 (or 307710 counting only the distinct ones).

The product of its (nonzero) digits is 19353600, while the sum is 57.

The spelling of 20116856475264 in words is "twenty trillion, one hundred sixteen billion, eight hundred fifty-six million, four hundred seventy-five thousand, two hundred sixty-four".