21624309224 has 32 divisors (see below), whose sum is σ = 46347326400. Its totient is φ = 9265656960.

The previous prime is 21624309221. The next prime is 21624309271. The reversal of 21624309224 is 42290342612.

It is a super-2 number, since 2×21624309224² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21624309221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254639 + ... + 328769.

It is an arithmetic number, because the mean of its divisors is an integer number (1448353950).

Almost surely, 2^21624309224 is an apocalyptic number.

It is an amenable number.

21624309224 is an abundant number, since it is smaller than the sum of its proper divisors (24723017176).

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

21624309224 is a wasteful number, since it uses less digits than its factorization.

21624309224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79353 (or 79349 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 21624309224 in words is "twenty-one billion, six hundred twenty-four million, three hundred nine thousand, two hundred twenty-four".