20311530064 has 40 divisors (see below), whose sum is σ = 46191095168. Its totient is φ = 8469671040.

The previous prime is 20311530059. The next prime is 20311530073. The reversal of 20311530064 is 46003511302.

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, 2446572 + ... + 2454859.

Almost surely, 2^20311530064 is an apocalyptic number.

It is an amenable number.

20311530064 is an abundant number, since it is smaller than the sum of its proper divisors (25879565104).

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

20311530064 is a wasteful number, since it uses less digits than its factorization.

20311530064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4901483 (or 4901477 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The spelling of 20311530064 in words is "twenty billion, three hundred eleven million, five hundred thirty thousand, sixty-four".