21598318832 has 40 divisors (see below), whose sum is σ = 42006998880. Its totient is φ = 10757871360.

The previous prime is 21598318811. The next prime is 21598318849. The reversal of 21598318832 is 23881389512.

It is a happy number.

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, 9723482 + ... + 9725702.

It is an arithmetic number, because the mean of its divisors is an integer number (1050174972).

Almost surely, 2^21598318832 is an apocalyptic number.

It is an amenable number.

21598318832 is a deficient number, since it is larger than the sum of its proper divisors (20408680048).

21598318832 is a wasteful number, since it uses less digits than its factorization.

21598318832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4281 (or 4275 counting only the distinct ones).

The product of its digits is 829440, while the sum is 50.

The spelling of 21598318832 in words is "twenty-one billion, five hundred ninety-eight million, three hundred eighteen thousand, eight hundred thirty-two".