21373540236604 has 24 divisors (see below), whose sum is σ = 37524810960000. Its totient is φ = 10652167228080.

The previous prime is 21373540236583. The next prime is 21373540236617. The reversal of 21373540236604 is 40663204537312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63349147 + ... + 63685645.

It is an arithmetic number, because the mean of its divisors is an integer number (1563533790000).

Almost surely, 2^{21373540236604} is an apocalyptic number.

It is an amenable number.

21373540236604 is a deficient number, since it is larger than the sum of its proper divisors (16151270723396).

21373540236604 is a wasteful number, since it uses less digits than its factorization.

21373540236604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387873 (or 387871 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 46.

The spelling of 21373540236604 in words is "twenty-one trillion, three hundred seventy-three billion, five hundred forty million, two hundred thirty-six thousand, six hundred four".