20252138 has 8 divisors (see below), whose sum is σ = 31977120. Its totient is φ = 9593100.

The previous prime is 20252137. The next prime is 20252149. The reversal of 20252138 is 83125202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20252131) 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, 266438 + ... + 266513.

It is an arithmetic number, because the mean of its divisors is an integer number (3997140).

Almost surely, 2^20252138 is an apocalyptic number.

20252138 is a deficient number, since it is larger than the sum of its proper divisors (11724982).

20252138 is a wasteful number, since it uses less digits than its factorization.

20252138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532972.

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

The square root of 20252138 is about 4500.2375492856. The cubic root of 20252138 is about 272.5776811893.

The spelling of 20252138 in words is "twenty million, two hundred fifty-two thousand, one hundred thirty-eight".