21237804558004 has 12 divisors (see below), whose sum is σ = 37297487158624. Its totient is φ = 10581379655544.

The previous prime is 21237804557947. The next prime is 21237804558007. The reversal of 21237804558004 is 40085540873212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21237804558007) 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, 9380654592 + ... + 9380656855.

Almost surely, 2^{21237804558004} is an apocalyptic number.

It is an amenable number.

21237804558004 is a deficient number, since it is larger than the sum of its proper divisors (16059682600620).

21237804558004 is a wasteful number, since it uses less digits than its factorization.

21237804558004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18761311734 (or 18761311732 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 49.

The spelling of 21237804558004 in words is "twenty-one trillion, two hundred thirty-seven billion, eight hundred four million, five hundred fifty-eight thousand, four".