20973215976 has 64 divisors (see below), whose sum is σ = 54306201600. Its totient is φ = 6741896448.

The previous prime is 20973215951. The next prime is 20973216029. The reversal of 20973215976 is 67951237902.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 576025 + ... + 611351.

It is an arithmetic number, because the mean of its divisors is an integer number (848534400).

Almost surely, 2^20973215976 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 20973215976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27153100800).

20973215976 is an abundant number, since it is smaller than the sum of its proper divisors (33332985624).

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

20973215976 is a wasteful number, since it uses less digits than its factorization.

20973215976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36218 (or 36214 counting only the distinct ones).

The product of its (nonzero) digits is 1428840, while the sum is 51.

The spelling of 20973215976 in words is "twenty billion, nine hundred seventy-three million, two hundred fifteen thousand, nine hundred seventy-six".