20364856 has 16 divisors (see below), whose sum is σ = 38278800. Its totient is φ = 10157184.

The previous prime is 20364847. The next prime is 20364881. The reversal of 20364856 is 65846302.

It is a happy number.

It is a congruent number.

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, 525 + ... + 6403.

It is an arithmetic number, because the mean of its divisors is an integer number (2392425).

Almost surely, 2^20364856 is an apocalyptic number.

It is an amenable number.

20364856 is a deficient number, since it is larger than the sum of its proper divisors (17913944).

20364856 is a wasteful number, since it uses less digits than its factorization.

20364856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6318 (or 6314 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 20364856 is about 4512.7437330298. The cubic root of 20364856 is about 273.0824441165.

The spelling of 20364856 in words is "twenty million, three hundred sixty-four thousand, eight hundred fifty-six".