20331232 has 12 divisors (see below), whose sum is σ = 40027176. Its totient is φ = 10165600.

The previous prime is 20331209. The next prime is 20331253. The reversal of 20331232 is 23213302.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317644 + ... + 317707.

It is an arithmetic number, because the mean of its divisors is an integer number (3335598).

Almost surely, 2^20331232 is an apocalyptic number.

It is an amenable number.

20331232 is a deficient number, since it is larger than the sum of its proper divisors (19695944).

20331232 is an equidigital number, since it uses as much as digits as its factorization.

20331232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635361 (or 635353 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 20331232 is about 4509.0167442581. The cubic root of 20331232 is about 272.9320676998.

Adding to 20331232 its reverse (23213302), we get a palindrome (43544534).

The spelling of 20331232 in words is "twenty million, three hundred thirty-one thousand, two hundred thirty-two".