20138132 has 24 divisors (see below), whose sum is σ = 42646464. Its totient is φ = 8122752.

The previous prime is 20138089. The next prime is 20138159. The reversal of 20138132 is 23183102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20678 + ... + 21629.

It is an arithmetic number, because the mean of its divisors is an integer number (1776936).

Almost surely, 2^20138132 is an apocalyptic number.

It is an amenable number.

20138132 is an abundant number, since it is smaller than the sum of its proper divisors (22508332).

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

20138132 is a wasteful number, since it uses less digits than its factorization.

20138132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42335 (or 42333 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 20138132 is about 4487.5530080435. The cubic root of 20138132 is about 272.0652417029.

The spelling of 20138132 in words is "twenty million, one hundred thirty-eight thousand, one hundred thirty-two".