21304873704 has 16 divisors (see below), whose sum is σ = 53262184320. Its totient is φ = 7101624560.

The previous prime is 21304873703. The next prime is 21304873741. The reversal of 21304873704 is 40737840312.

It is not an unprimeable number, because it can be changed into a prime (21304873703) 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, 443851512 + ... + 443851559.

It is an arithmetic number, because the mean of its divisors is an integer number (3328886520).

Almost surely, 2^21304873704 is an apocalyptic number.

21304873704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21304873704 is an abundant number, since it is smaller than the sum of its proper divisors (31957310616).

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

21304873704 is a wasteful number, since it uses less digits than its factorization.

21304873704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887703080 (or 887703076 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 39.

The spelling of 21304873704 in words is "twenty-one billion, three hundred four million, eight hundred seventy-three thousand, seven hundred four".