21549349324 has 12 divisors (see below), whose sum is σ = 37712724448. Its totient is φ = 10774285200.

The previous prime is 21549349309. The next prime is 21549349333. The reversal of 21549349324 is 42394394512.

It is a happy 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, 52894 + ... + 214234.

Almost surely, 2^21549349324 is an apocalyptic number.

It is an amenable number.

21549349324 is a deficient number, since it is larger than the sum of its proper divisors (16163375124).

21549349324 is a wasteful number, since it uses less digits than its factorization.

21549349324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194736 (or 194734 counting only the distinct ones).

The product of its digits is 933120, while the sum is 46.

The spelling of 21549349324 in words is "twenty-one billion, five hundred forty-nine million, three hundred forty-nine thousand, three hundred twenty-four".