99913518 has 24 divisors (see below), whose sum is σ = 225892368. Its totient is φ = 31856352.

The previous prime is 99913511. The next prime is 99913519. The reversal of 99913518 is 81531999.

It is a super-4 number, since 4×99913518⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99913511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120255 + ... + 121082.

It is an arithmetic number, because the mean of its divisors is an integer number (9412182).

Almost surely, 2^99913518 is an apocalyptic number.

99913518 is an abundant number, since it is smaller than the sum of its proper divisors (125978850).

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

99913518 is a wasteful number, since it uses less digits than its factorization.

99913518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241368 (or 241365 counting only the distinct ones).

The product of its digits is 87480, while the sum is 45.

The square root of 99913518 is about 9995.6749647035. The cubic root of 99913518 is about 464.0250401419.

The spelling of 99913518 in words is "ninety-nine million, nine hundred thirteen thousand, five hundred eighteen".