21224537324 has 12 divisors (see below), whose sum is σ = 37168548648. Its totient is φ = 10604952000.

The previous prime is 21224537303. The next prime is 21224537329. The reversal of 21224537324 is 42373542212.

It is not an unprimeable number, because it can be changed into a prime (21224537329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1822637 + ... + 1834244.

It is an arithmetic number, because the mean of its divisors is an integer number (3097379054).

Almost surely, 2^21224537324 is an apocalyptic number.

It is an amenable number.

21224537324 is a deficient number, since it is larger than the sum of its proper divisors (15944011324).

21224537324 is a wasteful number, since it uses less digits than its factorization.

21224537324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3658336 (or 3658334 counting only the distinct ones).

The product of its digits is 80640, while the sum is 35.

The spelling of 21224537324 in words is "twenty-one billion, two hundred twenty-four million, five hundred thirty-seven thousand, three hundred twenty-four".