21424772524 has 6 divisors (see below), whose sum is σ = 37493351924. Its totient is φ = 10712386260.

The previous prime is 21424772513. The next prime is 21424772531. The reversal of 21424772524 is 42527742412.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2678096562 + ... + 2678096569.

Almost surely, 2^21424772524 is an apocalyptic number.

It is an amenable number.

21424772524 is a deficient number, since it is larger than the sum of its proper divisors (16068579400).

21424772524 is a wasteful number, since it uses less digits than its factorization.

21424772524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5356193135 (or 5356193133 counting only the distinct ones).

The product of its digits is 250880, while the sum is 40.

The spelling of 21424772524 in words is "twenty-one billion, four hundred twenty-four million, seven hundred seventy-two thousand, five hundred twenty-four".