21858488504 has 16 divisors (see below), whose sum is σ = 41679322200. Its totient is φ = 10744002592.

The previous prime is 21858488503. The next prime is 21858488513. The reversal of 21858488504 is 40588485812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21858488501) 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, 23154707 + ... + 23155650.

Almost surely, 2^21858488504 is an apocalyptic number.

It is an amenable number.

21858488504 is a deficient number, since it is larger than the sum of its proper divisors (19820833696).

21858488504 is a wasteful number, since it uses less digits than its factorization.

21858488504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46310422 (or 46310418 counting only the distinct ones).

The product of its (nonzero) digits is 3276800, while the sum is 53.

The spelling of 21858488504 in words is "twenty-one billion, eight hundred fifty-eight million, four hundred eighty-eight thousand, five hundred four".