21304566432 has 96 divisors (see below), whose sum is σ = 62168097600. Its totient is φ = 7098119424.

The previous prime is 21304566397. The next prime is 21304566433. The reversal of 21304566432 is 23466540312.

21304566432 is a `hidden beast` number, since 2 + 1 + 3 + 0 + 4 + 5 + 6 + 643 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (21304566433) 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, 2334294 + ... + 2343402.

It is an arithmetic number, because the mean of its divisors is an integer number (647584350).

Almost surely, 2^21304566432 is an apocalyptic number.

It is an amenable number.

21304566432 is an abundant number, since it is smaller than the sum of its proper divisors (40863531168).

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

21304566432 is a wasteful number, since it uses less digits than its factorization.

21304566432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11835 (or 11821 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The spelling of 21304566432 in words is "twenty-one billion, three hundred four million, five hundred sixty-six thousand, four hundred thirty-two".