21320434332 has 48 divisors (see below), whose sum is σ = 58526687520. Its totient is φ = 6688763136.

The previous prime is 21320434327. The next prime is 21320434363. The reversal of 21320434332 is 23343402312.

21320434332 is a `hidden beast` number, since 2 + 1 + 320 + 4 + 3 + 4 + 332 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21320434296 and 21320434305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5804383 + ... + 5808054.

It is an arithmetic number, because the mean of its divisors is an integer number (1219305990).

Almost surely, 2^21320434332 is an apocalyptic number.

It is an amenable number.

21320434332 is an abundant number, since it is smaller than the sum of its proper divisors (37206253188).

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

21320434332 is a wasteful number, since it uses less digits than its factorization.

21320434332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11612467 (or 11612459 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 21320434332 its reverse (23343402312), we get a palindrome (44663836644).

The spelling of 21320434332 in words is "twenty-one billion, three hundred twenty million, four hundred thirty-four thousand, three hundred thirty-two".