21675849324 has 24 divisors (see below), whose sum is σ = 50833723248. Its totient is φ = 7188605760.

The previous prime is 21675849271. The next prime is 21675849331. The reversal of 21675849324 is 42394857612.

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, 4582207 + ... + 4586934.

It is an arithmetic number, because the mean of its divisors is an integer number (2118071802).

Almost surely, 2^21675849324 is an apocalyptic number.

It is an amenable number.

21675849324 is an abundant number, since it is smaller than the sum of its proper divisors (29157873924).

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

21675849324 is a wasteful number, since it uses less digits than its factorization.

21675849324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9169345 (or 9169343 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 51.

The spelling of 21675849324 in words is "twenty-one billion, six hundred seventy-five million, eight hundred forty-nine thousand, three hundred twenty-four".