18872999 has 8 divisors (see below), whose sum is σ = 19262880. Its totient is φ = 18487296.

The previous prime is 18872993. The next prime is 18873053. The reversal of 18872999 is 99927881.

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

It is a cyclic number.

It is not a de Polignac number, because 18872999 - 2¹⁶ = 18807463 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18872999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18872993) 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, 9047 + ... + 10935.

It is an arithmetic number, because the mean of its divisors is an integer number (2407860).

Almost surely, 2^18872999 is an apocalyptic number.

18872999 is a deficient number, since it is larger than the sum of its proper divisors (389881).

18872999 is a wasteful number, since it uses less digits than its factorization.

18872999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2089.

The product of its digits is 653184, while the sum is 53.

The square root of 18872999 is about 4344.3065039198. The cubic root of 18872999 is about 266.2442919420.

The spelling of 18872999 in words is "eighteen million, eight hundred seventy-two thousand, nine hundred ninety-nine".