20837619936 has 72 divisors (see below), whose sum is σ = 67722271344. Its totient is φ = 5953605120.

The previous prime is 20837619923. The next prime is 20837620033. The reversal of 20837619936 is 63991673802.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

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, 5166045 + ... + 5170076.

It is an arithmetic number, because the mean of its divisors is an integer number (940587102).

Almost surely, 2^20837619936 is an apocalyptic number.

It is an amenable number.

20837619936 is an abundant number, since it is smaller than the sum of its proper divisors (46884651408).

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

20837619936 is a wasteful number, since it uses less digits than its factorization.

20837619936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10336144 (or 10336133 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The spelling of 20837619936 in words is "twenty billion, eight hundred thirty-seven million, six hundred nineteen thousand, nine hundred thirty-six".