20131976 has 8 divisors (see below), whose sum is σ = 37747470. Its totient is φ = 10065984.

The previous prime is 20131939. The next prime is 20131981. The reversal of 20131976 is 67913102.

It can be written as a sum of positive squares in only one way, i.e., 19802500 + 329476 = 4450^2 + 574^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1258241 + ... + 1258256.

Almost surely, 2^20131976 is an apocalyptic number.

It is an amenable number.

20131976 is a deficient number, since it is larger than the sum of its proper divisors (17615494).

20131976 is a wasteful number, since it uses less digits than its factorization.

20131976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2516503 (or 2516499 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 20131976 is about 4486.8670584273. The cubic root of 20131976 is about 272.0375164515.

The spelling of 20131976 in words is "twenty million, one hundred thirty-one thousand, nine hundred seventy-six".