20856852 has 30 divisors (see below), whose sum is σ = 54524778. Its totient is φ = 6952176.

The previous prime is 20856839. The next prime is 20856877. The reversal of 20856852 is 25865802.

It can be written as a sum of positive squares in only one way, i.e., 19766916 + 1089936 = 4446^2 + 1044^2 .

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

It is a congruent number.

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, 31863 + ... + 32510.

Almost surely, 2^20856852 is an apocalyptic number.

It is an amenable number.

20856852 is an abundant number, since it is smaller than the sum of its proper divisors (33667926).

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

20856852 is a wasteful number, since it uses less digits than its factorization.

20856852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64389 (or 64378 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 20856852 is about 4566.9302600324. The cubic root of 20856852 is about 275.2641077045.

The spelling of 20856852 in words is "twenty million, eight hundred fifty-six thousand, eight hundred fifty-two".