20976960 has 56 divisors (see below), whose sum is σ = 66604896. Its totient is φ = 5593600.

The previous prime is 20976937. The next prime is 20976973. The reversal of 20976960 is 6967902.

It is a zygodrome in base 4.

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, 9966 + ... + 11885.

Almost surely, 2^20976960 is an apocalyptic number.

20976960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20976960 is an abundant number, since it is smaller than the sum of its proper divisors (45627936).

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

20976960 is a wasteful number, since it uses less digits than its factorization.

20976960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21871 (or 21861 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 20976960 is about 4580.0611349632. The cubic root of 20976960 is about 275.7914829174.

The spelling of 20976960 in words is "twenty million, nine hundred seventy-six thousand, nine hundred sixty".