20537309776 has 20 divisors (see below), whose sum is σ = 41521083552. Its totient is φ = 9822191456.

The previous prime is 20537309759. The next prime is 20537309843. The reversal of 20537309776 is 67790373502.

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, 27903586 + ... + 27904321.

Almost surely, 2^20537309776 is an apocalyptic number.

It is an amenable number.

20537309776 is an abundant number, since it is smaller than the sum of its proper divisors (20983773776).

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

20537309776 is a wasteful number, since it uses less digits than its factorization.

20537309776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55807938 (or 55807932 counting only the distinct ones).

The product of its (nonzero) digits is 1666980, while the sum is 49.

The spelling of 20537309776 in words is "twenty billion, five hundred thirty-seven million, three hundred nine thousand, seven hundred seventy-six".