20151238 has 16 divisors (see below), whose sum is σ = 30781296. Its totient is φ = 9892480.

The previous prime is 20151233. The next prime is 20151251. The reversal of 20151238 is 83215102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20151233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38418 + ... + 38938.

It is an arithmetic number, because the mean of its divisors is an integer number (1923831).

Almost surely, 2^20151238 is an apocalyptic number.

20151238 is a deficient number, since it is larger than the sum of its proper divisors (10630058).

20151238 is a wasteful number, since it uses less digits than its factorization.

20151238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 20151238 is about 4489.0130318367. The cubic root of 20151238 is about 272.1242493906.

The spelling of 20151238 in words is "twenty million, one hundred fifty-one thousand, two hundred thirty-eight".