21310051332 has 12 divisors (see below), whose sum is σ = 49723453136. Its totient is φ = 7103350440.

The previous prime is 21310051319. The next prime is 21310051339. The reversal of 21310051332 is 23315001312.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 21310051299 and 21310051308.

It is not an unprimeable number, because it can be changed into a prime (21310051339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 887918794 + ... + 887918817.

Almost surely, 2^21310051332 is an apocalyptic number.

It is an amenable number.

21310051332 is an abundant number, since it is smaller than the sum of its proper divisors (28413401804).

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

21310051332 is a wasteful number, since it uses less digits than its factorization.

21310051332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1775837618 (or 1775837616 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

Adding to 21310051332 its reverse (23315001312), we get a palindrome (44625052644).

The spelling of 21310051332 in words is "twenty-one billion, three hundred ten million, fifty-one thousand, three hundred thirty-two".