20910804384 has 48 divisors (see below), whose sum is σ = 57277426752. Its totient is φ = 6667212288.

The previous prime is 20910804377. The next prime is 20910804401. The reversal of 20910804384 is 48340801902.

It is a tau number, because it is divible by the number of its divisors (48).

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, 4733029 + ... + 4737444.

It is an arithmetic number, because the mean of its divisors is an integer number (1193279724).

Almost surely, 2^20910804384 is an apocalyptic number.

20910804384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20910804384 is an abundant number, since it is smaller than the sum of its proper divisors (36366622368).

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

20910804384 is a wasteful number, since it uses less digits than its factorization.

20910804384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9470509 (or 9470501 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The spelling of 20910804384 in words is "twenty billion, nine hundred ten million, eight hundred four thousand, three hundred eighty-four".