20880976 has 10 divisors (see below), whose sum is σ = 40456922. Its totient is φ = 10440480.

The previous prime is 20880973. The next prime is 20880989. The reversal of 20880976 is 67908802.

It can be written as a sum of positive squares in only one way, i.e., 20034576 + 846400 = 4476^2 + 920^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20880973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652515 + ... + 652546.

Almost surely, 2^20880976 is an apocalyptic number.

It is an amenable number.

20880976 is a deficient number, since it is larger than the sum of its proper divisors (19575946).

20880976 is a wasteful number, since it uses less digits than its factorization.

20880976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305069 (or 1305063 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 20880976 is about 4569.5706581691. The cubic root of 20880976 is about 275.3701945475.

The spelling of 20880976 in words is "twenty million, eight hundred eighty thousand, nine hundred seventy-six".