20952916 has 6 divisors (see below), whose sum is σ = 36667610. Its totient is φ = 10476456.

The previous prime is 20952887. The next prime is 20952923. The reversal of 20952916 is 61925902.

It can be written as a sum of positive squares in only one way, i.e., 17189316 + 3763600 = 4146^2 + 1940^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2619111 + ... + 2619118.

Almost surely, 2^20952916 is an apocalyptic number.

It is an amenable number.

20952916 is a deficient number, since it is larger than the sum of its proper divisors (15714694).

20952916 is a wasteful number, since it uses less digits than its factorization.

20952916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5238233 (or 5238231 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 20952916 is about 4577.4355265804. The cubic root of 20952916 is about 275.6860709863.

The spelling of 20952916 in words is "twenty million, nine hundred fifty-two thousand, nine hundred sixteen".