20881976 has 16 divisors (see below), whose sum is σ = 40856400. Its totient is φ = 9986944.

The previous prime is 20881963. The next prime is 20882009. The reversal of 20881976 is 67918802.

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, 56561 + ... + 56928.

It is an arithmetic number, because the mean of its divisors is an integer number (2553525).

Almost surely, 2^20881976 is an apocalyptic number.

It is an amenable number.

20881976 is a deficient number, since it is larger than the sum of its proper divisors (19974424).

20881976 is a wasteful number, since it uses less digits than its factorization.

20881976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113518 (or 113514 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 20881976 is about 4569.6800763292. The cubic root of 20881976 is about 275.3745903478.

The spelling of 20881976 in words is "twenty million, eight hundred eighty-one thousand, nine hundred seventy-six".