21131314032 has 80 divisors (see below), whose sum is σ = 57261477888. Its totient is φ = 6702178560.

The previous prime is 21131313997. The next prime is 21131314033. The reversal of 21131314032 is 23041313112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131314033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160758 + ... + 260970.

Almost surely, 2^21131314032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21131314032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28630738944).

21131314032 is an abundant number, since it is smaller than the sum of its proper divisors (36130163856).

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

21131314032 is a wasteful number, since it uses less digits than its factorization.

21131314032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100438 (or 100432 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21131314032 its reverse (23041313112), we get a palindrome (44172627144).

The spelling of 21131314032 in words is "twenty-one billion, one hundred thirty-one million, three hundred fourteen thousand, thirty-two".