20138852 has 12 divisors (see below), whose sum is σ = 35300076. Its totient is φ = 10053120.

The previous prime is 20138851. The next prime is 20138903. The reversal of 20138852 is 25883102.

It can be written as a sum of positive squares in 2 ways, for example, as 12432676 + 7706176 = 3526^2 + 2776^2 .

It is not an unprimeable number, because it can be changed into a prime (20138851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1049 + ... + 6432.

It is an arithmetic number, because the mean of its divisors is an integer number (2941673).

Almost surely, 2^20138852 is an apocalyptic number.

It is an amenable number.

20138852 is a deficient number, since it is larger than the sum of its proper divisors (15161224).

20138852 is a wasteful number, since it uses less digits than its factorization.

20138852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8158 (or 8156 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 20138852 is about 4487.6332292201. The cubic root of 20138852 is about 272.0684840532.

It can be divided in two parts, 201388 and 52, that multiplied together give a triangular number (10472176 = T₄₅₇₆).

The spelling of 20138852 in words is "twenty million, one hundred thirty-eight thousand, eight hundred fifty-two".