18870099 has 8 divisors (see below), whose sum is σ = 25210512. Its totient is φ = 12554880.

The previous prime is 18870091. The next prime is 18870101. The reversal of 18870099 is 99007881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18870099 - 2³ = 18870091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18870099.

It is not an unprimeable number, because it can be changed into a prime (18870091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4474 + ... + 7599.

It is an arithmetic number, because the mean of its divisors is an integer number (3151314).

Almost surely, 2^18870099 is an apocalyptic number.

18870099 is a deficient number, since it is larger than the sum of its proper divisors (6340413).

18870099 is a wasteful number, since it uses less digits than its factorization.

18870099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12597.

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 18870099 is about 4343.9727209088. The cubic root of 18870099 is about 266.2306543285.

The spelling of 18870099 in words is "eighteen million, eight hundred seventy thousand, ninety-nine".