20139232 has 12 divisors (see below), whose sum is σ = 39649176. Its totient is φ = 10069600.

The previous prime is 20139227. The next prime is 20139239. The reversal of 20139232 is 23293102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20139239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314644 + ... + 314707.

It is an arithmetic number, because the mean of its divisors is an integer number (3304098).

Almost surely, 2^20139232 is an apocalyptic number.

It is an amenable number.

20139232 is a deficient number, since it is larger than the sum of its proper divisors (19509944).

20139232 is an equidigital number, since it uses as much as digits as its factorization.

20139232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629361 (or 629353 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 20139232 is about 4487.6755675962. The cubic root of 20139232 is about 272.0701952626.

The spelling of 20139232 in words is "twenty million, one hundred thirty-nine thousand, two hundred thirty-two".