21868085604 has 24 divisors (see below), whose sum is σ = 51310596960. Its totient is φ = 7248638464.

The previous prime is 21868085573. The next prime is 21868085611. The reversal of 21868085604 is 40658086812.

It is a happy number.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

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, 5088189 + ... + 5092484.

It is an arithmetic number, because the mean of its divisors is an integer number (2137941540).

Almost surely, 2^21868085604 is an apocalyptic number.

It is an amenable number.

21868085604 is an abundant number, since it is smaller than the sum of its proper divisors (29442511356).

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

21868085604 is a wasteful number, since it uses less digits than its factorization.

21868085604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10180859 (or 10180857 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 48.

The spelling of 21868085604 in words is "twenty-one billion, eight hundred sixty-eight million, eighty-five thousand, six hundred four".