21749241324 has 24 divisors (see below), whose sum is σ = 52954675200. Its totient is φ = 6934540624.

The previous prime is 21749241289. The next prime is 21749241359. The reversal of 21749241324 is 42314294712.

It is an interprime number because it is at equal distance from previous prime (21749241289) and next prime (21749241359).

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, 39400524 + ... + 39401075.

It is an arithmetic number, because the mean of its divisors is an integer number (2206444800).

Almost surely, 2^21749241324 is an apocalyptic number.

It is an amenable number.

21749241324 is an abundant number, since it is smaller than the sum of its proper divisors (31205433876).

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

21749241324 is a wasteful number, since it uses less digits than its factorization.

21749241324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78801629 (or 78801627 counting only the distinct ones).

The product of its digits is 96768, while the sum is 39.

The spelling of 21749241324 in words is "twenty-one billion, seven hundred forty-nine million, two hundred forty-one thousand, three hundred twenty-four".