21243052332 has 48 divisors (see below), whose sum is σ = 55107472000. Its totient is φ = 7076788560.

The previous prime is 21243052301. The next prime is 21243052357. The reversal of 21243052332 is 23325034212.

21243052332 is a `hidden beast` number, since 2 + 1 + 24 + 305 + 2 + 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 = 21243052296 and 21243052305.

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, 125607 + ... + 241377.

Almost surely, 2^21243052332 is an apocalyptic number.

It is an amenable number.

21243052332 is an abundant number, since it is smaller than the sum of its proper divisors (33864419668).

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

21243052332 is a wasteful number, since it uses less digits than its factorization.

21243052332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117483 (or 117475 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 21243052332 its reverse (23325034212), we get a palindrome (44568086544).

The spelling of 21243052332 in words is "twenty-one billion, two hundred forty-three million, fifty-two thousand, three hundred thirty-two".