20331213232 has 80 divisors (see below), whose sum is σ = 43339618944. Its totient is φ = 9162944000.

The previous prime is 20331213163. The next prime is 20331213247. The reversal of 20331213232 is 23231213302.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11225607 + ... + 11227417.

Almost surely, 2^20331213232 is an apocalyptic number.

20331213232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20331213232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21669809472).

20331213232 is an abundant number, since it is smaller than the sum of its proper divisors (23008405712).

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

20331213232 is a wasteful number, since it uses less digits than its factorization.

20331213232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338 (or 2332 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 20331213232 its reverse (23231213302), we get a palindrome (43562426534).

The spelling of 20331213232 in words is "twenty billion, three hundred thirty-one million, two hundred thirteen thousand, two hundred thirty-two".