21304656024 has 16 divisors (see below), whose sum is σ = 53261640120. Its totient is φ = 7101552000.

The previous prime is 21304656017. The next prime is 21304656029. The reversal of 21304656024 is 42065640312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21304656029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443846977 + ... + 443847024.

Almost surely, 2^21304656024 is an apocalyptic number.

21304656024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21304656024 is an abundant number, since it is smaller than the sum of its proper divisors (31956984096).

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

21304656024 is a wasteful number, since it uses less digits than its factorization.

21304656024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887694010 (or 887694006 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 21304656024 in words is "twenty-one billion, three hundred four million, six hundred fifty-six thousand, twenty-four".