21455843088 has 40 divisors (see below), whose sum is σ = 56254880608. Its totient is φ = 7045201152.

The previous prime is 21455843051. The next prime is 21455843131. The reversal of 21455843088 is 88034855412.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 3332581 + ... + 3339012.

Almost surely, 2^21455843088 is an apocalyptic number.

It is an amenable number.

21455843088 is an abundant number, since it is smaller than the sum of its proper divisors (34799037520).

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

21455843088 is a wasteful number, since it uses less digits than its factorization.

21455843088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6671671 (or 6671665 counting only the distinct ones).

The product of its (nonzero) digits is 1228800, while the sum is 48.

The spelling of 21455843088 in words is "twenty-one billion, four hundred fifty-five million, eight hundred forty-three thousand, eighty-eight".