18975799 has 4 divisors (see below), whose sum is σ = 19009264. Its totient is φ = 18942336.

The previous prime is 18975797. The next prime is 18975811. The reversal of 18975799 is 99757981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99757981 = 677 ⋅147353.

It is a cyclic number.

It is not a de Polignac number, because 18975799 - 2¹ = 18975797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18975797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15867 + ... + 17020.

It is an arithmetic number, because the mean of its divisors is an integer number (4752316).

Almost surely, 2^18975799 is an apocalyptic number.

18975799 is a deficient number, since it is larger than the sum of its proper divisors (33465).

18975799 is an equidigital number, since it uses as much as digits as its factorization.

18975799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33464.

The product of its digits is 1428840, while the sum is 55.

The square root of 18975799 is about 4356.1220139018. The cubic root of 18975799 is about 266.7268220193.

The spelling of 18975799 in words is "eighteen million, nine hundred seventy-five thousand, seven hundred ninety-nine".