21838336584 has 32 divisors (see below), whose sum is σ = 57469308000. Its totient is φ = 6896316672.

The previous prime is 21838336549. The next prime is 21838336591. The reversal of 21838336584 is 48563383812.

It is a happy 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, 23945089 + ... + 23946000.

It is an arithmetic number, because the mean of its divisors is an integer number (1795915875).

Almost surely, 2^21838336584 is an apocalyptic number.

21838336584 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21838336584 is an abundant number, since it is smaller than the sum of its proper divisors (35630971416).

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

21838336584 is a wasteful number, since it uses less digits than its factorization.

21838336584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47891117 (or 47891113 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 51.

The spelling of 21838336584 in words is "twenty-one billion, eight hundred thirty-eight million, three hundred thirty-six thousand, five hundred eighty-four".