20131212032 has 36 divisors (see below), whose sum is σ = 40344010056. Its totient is φ = 10025472000.

The previous prime is 20131212029. The next prime is 20131212043. The reversal of 20131212032 is 23021213102.

It is a self number, because there is not a number n which added to its sum of digits gives 20131212032.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92393 + ... + 220904.

It is an arithmetic number, because the mean of its divisors is an integer number (1120666946).

Almost surely, 2^20131212032 is an apocalyptic number.

It is an amenable number.

20131212032 is an abundant number, since it is smaller than the sum of its proper divisors (20212798024).

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

20131212032 is an equidigital number, since it uses as much as digits as its factorization.

20131212032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313564 (or 313550 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20131212032 its reverse (23021213102), we get a palindrome (43152425134).

The spelling of 20131212032 in words is "twenty billion, one hundred thirty-one million, two hundred twelve thousand, thirty-two".