21313604104 has 16 divisors (see below), whose sum is σ = 43037085420. Its totient is φ = 9837048000.

The previous prime is 21313604099. The next prime is 21313604107. The reversal of 21313604104 is 40140631312.

It can be written as a sum of positive squares in 2 ways, for example, as 17292776004 + 4020828100 = 131502^2 + 63410^2 .

It is not an unprimeable number, because it can be changed into a prime (21313604107) 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, 102469147 + ... + 102469354.

Almost surely, 2^21313604104 is an apocalyptic number.

It is an amenable number.

21313604104 is an abundant number, since it is smaller than the sum of its proper divisors (21723481316).

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

21313604104 is a wasteful number, since it uses less digits than its factorization.

21313604104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204938520 (or 204938516 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The spelling of 21313604104 in words is "twenty-one billion, three hundred thirteen million, six hundred four thousand, one hundred four".