20157232 has 40 divisors (see below), whose sum is σ = 40265280. Its totient is φ = 9771840.

The previous prime is 20157229. The next prime is 20157253. The reversal of 20157232 is 23275102.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 123583 + ... + 123745.

It is an arithmetic number, because the mean of its divisors is an integer number (1006632).

Almost surely, 2^20157232 is an apocalyptic number.

It is an amenable number.

20157232 is a deficient number, since it is larger than the sum of its proper divisors (20108048).

20157232 is a wasteful number, since it uses less digits than its factorization.

20157232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361 (or 355 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20157232 is about 4489.6806122485. The cubic root of 20157232 is about 272.1512278994.

The spelling of 20157232 in words is "twenty million, one hundred fifty-seven thousand, two hundred thirty-two".