9918521124 has 24 divisors (see below), whose sum is σ = 23579881920. Its totient is φ = 3243792864.

The previous prime is 9918521111. The next prime is 9918521141. The reversal of 9918521124 is 4211258199.

It is a super-2 number, since 2×9918521124² (a number of 21 digits) contains 22 as substring.

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, 7796944 + ... + 7798215.

It is an arithmetic number, because the mean of its divisors is an integer number (982495080).

Almost surely, 2^9918521124 is an apocalyptic number.

It is an amenable number.

9918521124 is an abundant number, since it is smaller than the sum of its proper divisors (13661360796).

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

9918521124 is a wasteful number, since it uses less digits than its factorization.

9918521124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15595219 (or 15595217 counting only the distinct ones).

The product of its digits is 51840, while the sum is 42.

The square root of 9918521124 is about 99591.7723710147. The cubic root of 9918521124 is about 2148.5673617178.

The spelling of 9918521124 in words is "nine billion, nine hundred eighteen million, five hundred twenty-one thousand, one hundred twenty-four".