20138252 has 12 divisors (see below), whose sum is σ = 37096920. Its totient is φ = 9539136.

The previous prime is 20138243. The next prime is 20138269. The reversal of 20138252 is 25283102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132413 + ... + 132564.

It is an arithmetic number, because the mean of its divisors is an integer number (3091410).

Almost surely, 2^20138252 is an apocalyptic number.

It is an amenable number.

20138252 is a deficient number, since it is larger than the sum of its proper divisors (16958668).

20138252 is a wasteful number, since it uses less digits than its factorization.

20138252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265000 (or 264998 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 20138252 is about 4487.5663783392. The cubic root of 20138252 is about 272.0657821000.

The spelling of 20138252 in words is "twenty million, one hundred thirty-eight thousand, two hundred fifty-two".