20814956 has 12 divisors (see below), whose sum is σ = 38343480. Its totient is φ = 9859680.

The previous prime is 20814949. The next prime is 20814971. The reversal of 20814956 is 65941802.

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, 136865 + ... + 137016.

It is an arithmetic number, because the mean of its divisors is an integer number (3195290).

Almost surely, 2^20814956 is an apocalyptic number.

It is an amenable number.

20814956 is a deficient number, since it is larger than the sum of its proper divisors (17528524).

20814956 is a wasteful number, since it uses less digits than its factorization.

20814956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273904 (or 273902 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 20814956 is about 4562.3410657249. The cubic root of 20814956 is about 275.0796727828.

The spelling of 20814956 in words is "twenty million, eight hundred fourteen thousand, nine hundred fifty-six".