21839641584 has 20 divisors (see below), whose sum is σ = 56419074216. Its totient is φ = 7279880512.

The previous prime is 21839641573. The next prime is 21839641601. The reversal of 21839641584 is 48514693812.

It is a congruent number.

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, 227496219 + ... + 227496314.

Almost surely, 2^21839641584 is an apocalyptic number.

21839641584 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21839641584 is an abundant number, since it is smaller than the sum of its proper divisors (34579432632).

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

21839641584 is a wasteful number, since it uses less digits than its factorization.

21839641584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454992544 (or 454992538 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 51.

The spelling of 21839641584 in words is "twenty-one billion, eight hundred thirty-nine million, six hundred forty-one thousand, five hundred eighty-four".