21573763498 has 16 divisors (see below), whose sum is σ = 36985544064. Its totient is φ = 9245411280.

The previous prime is 21573763481. The next prime is 21573763513. The reversal of 21573763498 is 89436737512.

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, 397243 + ... + 448273.

It is an arithmetic number, because the mean of its divisors is an integer number (2311596504).

Almost surely, 2^21573763498 is an apocalyptic number.

21573763498 is a deficient number, since it is larger than the sum of its proper divisors (15411780566).

21573763498 is a wasteful number, since it uses less digits than its factorization.

21573763498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81237.

The product of its digits is 7620480, while the sum is 55.

The spelling of 21573763498 in words is "twenty-one billion, five hundred seventy-three million, seven hundred sixty-three thousand, four hundred ninety-eight".