20320564236 has 48 divisors (see below), whose sum is σ = 57375714816. Its totient is φ = 5464353024.

The previous prime is 20320564217. The next prime is 20320564247. The reversal of 20320564236 is 63246502302.

It is a junction number, because it is equal to n+sod(n) for n = 20320564197 and 20320564206.

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, 7113616 + ... + 7116471.

It is an arithmetic number, because the mean of its divisors is an integer number (1195327392).

Almost surely, 2^20320564236 is an apocalyptic number.

It is an amenable number.

20320564236 is an abundant number, since it is smaller than the sum of its proper divisors (37055150580).

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

20320564236 is a wasteful number, since it uses less digits than its factorization.

20320564236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14230118 (or 14230116 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 33.

The spelling of 20320564236 in words is "twenty billion, three hundred twenty million, five hundred sixty-four thousand, two hundred thirty-six".