20937965568 has 120 divisors (see below), whose sum is σ = 60129542088. Its totient is φ = 6442450944.

The previous prime is 20937965551. The next prime is 20937965623. The reversal of 20937965568 is 86556973902.

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, 1610612730 + ... + 1610612742.

Almost surely, 2^20937965568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20937965568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30064771044).

20937965568 is an abundant number, since it is smaller than the sum of its proper divisors (39191576520).

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

20937965568 is an frugal number, since it uses more digits than its factorization.

20937965568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 24494400, while the sum is 60.

The spelling of 20937965568 in words is "twenty billion, nine hundred thirty-seven million, nine hundred sixty-five thousand, five hundred sixty-eight".