20315656004 has 12 divisors (see below), whose sum is σ = 40631312064. Its totient is φ = 8706709704.

The previous prime is 20315656003. The next prime is 20315656051. The reversal of 20315656004 is 40065651302.

20315656004 is an admirable number.

It is a super-2 number, since 2×20315656004² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20315656003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362779544 + ... + 362779599.

It is an arithmetic number, because the mean of its divisors is an integer number (3385942672).

Almost surely, 2^20315656004 is an apocalyptic number.

It is an amenable number.

20315656004 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20315656004 is a wasteful number, since it uses less digits than its factorization.

20315656004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725559154 (or 725559152 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 20315656004 in words is "twenty billion, three hundred fifteen million, six hundred fifty-six thousand, four".