21174204704 has 24 divisors (see below), whose sum is σ = 41868768060. Its totient is φ = 10540866816.

The previous prime is 21174204679. The next prime is 21174204707. The reversal of 21174204704 is 40740247112.

It can be written as a sum of positive squares in 2 ways, for example, as 21126041104 + 48163600 = 145348^2 + 6940^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (21174204707) 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, 1437419 + ... + 1452074.

Almost surely, 2^21174204704 is an apocalyptic number.

It is an amenable number.

21174204704 is a deficient number, since it is larger than the sum of its proper divisors (20694563356).

21174204704 is a wasteful number, since it uses less digits than its factorization.

21174204704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2889732 (or 2889724 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The spelling of 21174204704 in words is "twenty-one billion, one hundred seventy-four million, two hundred four thousand, seven hundred four".