21442675584 has 64 divisors (see below), whose sum is σ = 62135038080. Its totient is φ = 6497779200.

The previous prime is 21442675523. The next prime is 21442675609. The reversal of 21442675584 is 48557624412.

It is a tau number, because it is divible by the number of its divisors (64).

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

It is a congruent number.

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, 2533972 + ... + 2542419.

It is an arithmetic number, because the mean of its divisors is an integer number (970859970).

Almost surely, 2^21442675584 is an apocalyptic number.

21442675584 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21442675584 is an abundant number, since it is smaller than the sum of its proper divisors (40692362496).

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

21442675584 is a wasteful number, since it uses less digits than its factorization.

21442675584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5076419 (or 5076407 counting only the distinct ones).

The product of its digits is 2150400, while the sum is 48.

The spelling of 21442675584 in words is "twenty-one billion, four hundred forty-two million, six hundred seventy-five thousand, five hundred eighty-four".