20290015872 has 96 divisors (see below), whose sum is σ = 66727608480. Its totient is φ = 5797145088.

The previous prime is 20290015853. The next prime is 20290015883. The reversal of 20290015872 is 27851009202.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1249998 + ... + 1266125.

It is an arithmetic number, because the mean of its divisors is an integer number (695079255).

Almost surely, 2^20290015872 is an apocalyptic number.

It is an amenable number.

20290015872 is an abundant number, since it is smaller than the sum of its proper divisors (46437592608).

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

20290015872 is a wasteful number, since it uses less digits than its factorization.

20290015872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516150 (or 2516135 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 20290015872 in words is "twenty billion, two hundred ninety million, fifteen thousand, eight hundred seventy-two".