20315888992 has 24 divisors (see below), whose sum is σ = 45710750736. Its totient is φ = 8706809472.

The previous prime is 20315888987. The next prime is 20315889007. The reversal of 20315888992 is 29988851302.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45347743 + ... + 45348190.

It is an arithmetic number, because the mean of its divisors is an integer number (1904614614).

Almost surely, 2^20315888992 is an apocalyptic number.

It is an amenable number.

20315888992 is an abundant number, since it is smaller than the sum of its proper divisors (25394861744).

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

20315888992 is an equidigital number, since it uses as much as digits as its factorization.

20315888992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90695950 (or 90695942 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 55.

The spelling of 20315888992 in words is "twenty billion, three hundred fifteen million, eight hundred eighty-eight thousand, nine hundred ninety-two".