20944307636 has 24 divisors (see below), whose sum is σ = 41904218496. Its totient is φ = 8972788320.

The previous prime is 20944307617. The next prime is 20944307647. The reversal of 20944307636 is 63670344902.

It is a congruent number.

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, 62051 + ... + 213866.

It is an arithmetic number, because the mean of its divisors is an integer number (1746009104).

Almost surely, 2^20944307636 is an apocalyptic number.

It is an amenable number.

20944307636 is an abundant number, since it is smaller than the sum of its proper divisors (20959910860).

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

20944307636 is a wasteful number, since it uses less digits than its factorization.

20944307636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278639 (or 278637 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 44.

The spelling of 20944307636 in words is "twenty billion, nine hundred forty-four million, three hundred seven thousand, six hundred thirty-six".