21598492484 has 24 divisors (see below), whose sum is σ = 39047904000. Its totient is φ = 10442507040.

The previous prime is 21598492457. The next prime is 21598492501. The reversal of 21598492484 is 48429489512.

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, 86942 + ... + 225290.

It is an arithmetic number, because the mean of its divisors is an integer number (1626996000).

Almost surely, 2^21598492484 is an apocalyptic number.

It is an amenable number.

21598492484 is a deficient number, since it is larger than the sum of its proper divisors (17449411516).

21598492484 is a wasteful number, since it uses less digits than its factorization.

21598492484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139643 (or 139641 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 56.

The spelling of 21598492484 in words is "twenty-one billion, five hundred ninety-eight million, four hundred ninety-two thousand, four hundred eighty-four".