18099135 has 48 divisors (see below), whose sum is σ = 33864480. Its totient is φ = 8908800.

The previous prime is 18099131. The next prime is 18099143. The reversal of 18099135 is 53199081.

It is a happy number.

It is not a de Polignac number, because 18099135 - 2² = 18099131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18099135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18099131) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44935 + ... + 45335.

It is an arithmetic number, because the mean of its divisors is an integer number (705510).

Almost surely, 2^18099135 is an apocalyptic number.

18099135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18099135 is a deficient number, since it is larger than the sum of its proper divisors (15765345).

18099135 is a wasteful number, since it uses less digits than its factorization.

18099135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 18099135 is about 4254.3078167899. The cubic root of 18099135 is about 262.5543832902.

The spelling of 18099135 in words is "eighteen million, ninety-nine thousand, one hundred thirty-five".