20021213312232 has 128 divisors (see below), whose sum is σ = 54695317132800. Its totient is φ = 6056816774400.

The previous prime is 20021213312183. The next prime is 20021213312237. The reversal of 20021213312232 is 23221331212002.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (20021213312237) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 652970982 + ... + 653001642.

It is an arithmetic number, because the mean of its divisors is an integer number (427307165100).

Almost surely, 2^{20021213312232} is an apocalyptic number.

20021213312232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20021213312232 is an abundant number, since it is smaller than the sum of its proper divisors (34674103820568).

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

20021213312232 is a wasteful number, since it uses less digits than its factorization.

20021213312232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34767 (or 34763 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 20021213312232 its reverse (23221331212002), we get a palindrome (43242544524234).

The spelling of 20021213312232 in words is "twenty trillion, twenty-one billion, two hundred thirteen million, three hundred twelve thousand, two hundred thirty-two".