21624386124 has 24 divisors (see below), whose sum is σ = 55043892288. Its totient is φ = 6552844240.

The previous prime is 21624386101. The next prime is 21624386129. The reversal of 21624386124 is 42168342612.

It is a super-2 number, since 2×21624386124² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21624386129) 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, 81910422 + ... + 81910685.

It is an arithmetic number, because the mean of its divisors is an integer number (2293495512).

Almost surely, 2^21624386124 is an apocalyptic number.

It is an amenable number.

21624386124 is an abundant number, since it is smaller than the sum of its proper divisors (33419506164).

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

21624386124 is a wasteful number, since it uses less digits than its factorization.

21624386124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163821125 (or 163821123 counting only the distinct ones).

The product of its digits is 110592, while the sum is 39.

The spelling of 21624386124 in words is "twenty-one billion, six hundred twenty-four million, three hundred eighty-six thousand, one hundred twenty-four".