18849599 has 4 divisors (see below), whose sum is σ = 18948480. Its totient is φ = 18750720.

The previous prime is 18849559. The next prime is 18849601. The reversal of 18849599 is 99594881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99594881 = 521 ⋅191161.

It is a cyclic number.

It is not a de Polignac number, because 18849599 - 2²⁴ = 2072383 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 18849599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18849559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49154 + ... + 49535.

It is an arithmetic number, because the mean of its divisors is an integer number (4737120).

Almost surely, 2^18849599 is an apocalyptic number.

18849599 is a deficient number, since it is larger than the sum of its proper divisors (98881).

18849599 is an equidigital number, since it uses as much as digits as its factorization.

18849599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98880.

The product of its digits is 933120, while the sum is 53.

The square root of 18849599 is about 4341.6124884655. The cubic root of 18849599 is about 266.1342106375.

The spelling of 18849599 in words is "eighteen million, eight hundred forty-nine thousand, five hundred ninety-nine".