99912018 has 32 divisors (see below), whose sum is σ = 207547200. Its totient is φ = 32026176.

The previous prime is 99912017. The next prime is 99912053. The reversal of 99912018 is 81021999.

It is a happy number.

It is a super-2 number, since 2×99912018² = 19964822681664648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99912017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48228 + ... + 50256.

It is an arithmetic number, because the mean of its divisors is an integer number (6485850).

Almost surely, 2^99912018 is an apocalyptic number.

99912018 is an abundant number, since it is smaller than the sum of its proper divisors (107635182).

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

99912018 is a wasteful number, since it uses less digits than its factorization.

99912018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2346.

The product of its (nonzero) digits is 11664, while the sum is 39.

The square root of 99912018 is about 9995.5999319701. The cubic root of 99912018 is about 464.0227179969.

The spelling of 99912018 in words is "ninety-nine million, nine hundred twelve thousand, eighteen".