20853936 has 50 divisors (see below), whose sum is σ = 60361092. Its totient is φ = 6950880.

The previous prime is 20853923. The next prime is 20853941. The reversal of 20853936 is 63935802.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20853936.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6750 + ... + 9341.

Almost surely, 2^20853936 is an apocalyptic number.

It is an amenable number.

20853936 is an abundant number, since it is smaller than the sum of its proper divisors (39507156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20853936 is a wasteful number, since it uses less digits than its factorization.

20853936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16111 (or 16096 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 20853936 is about 4566.6109972276. The cubic root of 20853936 is about 275.2512788661.

The spelling of 20853936 in words is "twenty million, eight hundred fifty-three thousand, nine hundred thirty-six".