20123312132 has 24 divisors (see below), whose sum is σ = 43905408960. Its totient is φ = 7840251360.

The previous prime is 20123312117. The next prime is 20123312141. The reversal of 20123312132 is 23121332102.

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, 32667407 + ... + 32668022.

It is an arithmetic number, because the mean of its divisors is an integer number (1829392040).

Almost surely, 2^20123312132 is an apocalyptic number.

20123312132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20123312132 is an abundant number, since it is smaller than the sum of its proper divisors (23782096828).

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

20123312132 is a wasteful number, since it uses less digits than its factorization.

20123312132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65335451 (or 65335449 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20123312132 its reverse (23121332102), we get a palindrome (43244644234).

The spelling of 20123312132 in words is "twenty billion, one hundred twenty-three million, three hundred twelve thousand, one hundred thirty-two".