20371239 has 24 divisors (see below), whose sum is σ = 34268832. Its totient is φ = 11419200.

The previous prime is 20371231. The next prime is 20371243. The reversal of 20371239 is 93217302.

It is not a de Polignac number, because 20371239 - 2³ = 20371231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20371231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 289 + ... + 6389.

It is an arithmetic number, because the mean of its divisors is an integer number (1427868).

Almost surely, 2^20371239 is an apocalyptic number.

20371239 is a deficient number, since it is larger than the sum of its proper divisors (13897593).

20371239 is a wasteful number, since it uses less digits than its factorization.

20371239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6167 (or 6164 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 20371239 is about 4513.4508970410. The cubic root of 20371239 is about 273.1109720727.

The spelling of 20371239 in words is "twenty million, three hundred seventy-one thousand, two hundred thirty-nine".