20575156264 has 64 divisors (see below), whose sum is σ = 42174316800. Its totient is φ = 9353200896.

The previous prime is 20575156213. The next prime is 20575156313. The reversal of 20575156264 is 46265157502.

It is a self number, because there is not a number n which added to its sum of digits gives 20575156264.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3636862 + ... + 3642514.

It is an arithmetic number, because the mean of its divisors is an integer number (658973700).

Almost surely, 2^20575156264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20575156264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21087158400).

20575156264 is an abundant number, since it is smaller than the sum of its proper divisors (21599160536).

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

20575156264 is a wasteful number, since it uses less digits than its factorization.

20575156264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6194 (or 6190 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 43.

The spelling of 20575156264 in words is "twenty billion, five hundred seventy-five million, one hundred fifty-six thousand, two hundred sixty-four".