20331332 has 24 divisors (see below), whose sum is σ = 40764864. Its totient is φ = 8691552.

The previous prime is 20331329. The next prime is 20331373. The reversal of 20331332 is 23313302.

It is a self number, because there is not a number n which added to its sum of digits gives 20331332.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15818 + ... + 17054.

It is an arithmetic number, because the mean of its divisors is an integer number (1698536).

Almost surely, 2^20331332 is an apocalyptic number.

It is an amenable number.

20331332 is an abundant number, since it is smaller than the sum of its proper divisors (20433532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20331332 is a wasteful number, since it uses less digits than its factorization.

20331332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835 (or 1833 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 17.

The square root of 20331332 is about 4509.0278331365. The cubic root of 20331332 is about 272.9325151749.

Adding to 20331332 its reverse (23313302), we get a palindrome (43644634).

The spelling of 20331332 in words is "twenty million, three hundred thirty-one thousand, three hundred thirty-two".