20620751784 has 32 divisors (see below), whose sum is σ = 51603959040. Its totient is φ = 6866640000.

The previous prime is 20620751731. The next prime is 20620751831. The reversal of 20620751784 is 48715702602.

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, 409717 + ... + 457284.

It is an arithmetic number, because the mean of its divisors is an integer number (1612623720).

Almost surely, 2^20620751784 is an apocalyptic number.

20620751784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20620751784 is an abundant number, since it is smaller than the sum of its proper divisors (30983207256).

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

20620751784 is a wasteful number, since it uses less digits than its factorization.

20620751784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868001 (or 867997 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 42.

The spelling of 20620751784 in words is "twenty billion, six hundred twenty million, seven hundred fifty-one thousand, seven hundred eighty-four".