21458858604 has 12 divisors (see below), whose sum is σ = 50070670104. Its totient is φ = 7152952864.

The previous prime is 21458858567. The next prime is 21458858627. The reversal of 21458858604 is 40685885412.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×21458858604² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 894119097 + ... + 894119120.

It is an arithmetic number, because the mean of its divisors is an integer number (4172555842).

Almost surely, 2^21458858604 is an apocalyptic number.

It is an amenable number.

21458858604 is an abundant number, since it is smaller than the sum of its proper divisors (28611811500).

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

21458858604 is a wasteful number, since it uses less digits than its factorization.

21458858604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788238224 (or 1788238222 counting only the distinct ones).

The product of its (nonzero) digits is 2457600, while the sum is 51.

The spelling of 21458858604 in words is "twenty-one billion, four hundred fifty-eight million, eight hundred fifty-eight thousand, six hundred four".