20873764 has 6 divisors (see below), whose sum is σ = 36529094. Its totient is φ = 10436880.

The previous prime is 20873759. The next prime is 20873777. The reversal of 20873764 is 46737802.

It can be written as a sum of positive squares in only one way, i.e., 19873764 + 1000000 = 4458^2 + 1000^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2609217 + ... + 2609224.

Almost surely, 2^20873764 is an apocalyptic number.

It is an amenable number.

20873764 is a deficient number, since it is larger than the sum of its proper divisors (15655330).

20873764 is a wasteful number, since it uses less digits than its factorization.

20873764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5218445 (or 5218443 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 20873764 is about 4568.7814568001. The cubic root of 20873764 is about 275.3384878794.

The spelling of 20873764 in words is "twenty million, eight hundred seventy-three thousand, seven hundred sixty-four".