20838852 has 18 divisors (see below), whose sum is σ = 52676078. Its totient is φ = 6946272.

The previous prime is 20838847. The next prime is 20838863. The reversal of 20838852 is 25883802.

It can be written as a sum of positive squares in only one way, i.e., 18096516 + 2742336 = 4254^2 + 1656^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 578857 = 20838852 / (2 + 0 + 8 + 3 + 8 + 8 + 5 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 289393 + ... + 289464.

Almost surely, 2^20838852 is an apocalyptic number.

It is an amenable number.

20838852 is an abundant number, since it is smaller than the sum of its proper divisors (31837226).

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

20838852 is a wasteful number, since it uses less digits than its factorization.

20838852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578867 (or 578862 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 20838852 is about 4564.9591454908. The cubic root of 20838852 is about 275.1848982440.

It can be divided in two parts, 208 and 38852, that added together give a triangular number (39060 = T₂₇₉).

The spelling of 20838852 in words is "twenty million, eight hundred thirty-eight thousand, eight hundred fifty-two".