18999045 has 48 divisors (see below), whose sum is σ = 36271872. Its totient is φ = 9141120.

The previous prime is 18999037. The next prime is 18999091. The reversal of 18999045 is 54099981.

It is not a de Polignac number, because 18999045 - 2³ = 18999037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 27150 + ... + 27840.

It is an arithmetic number, because the mean of its divisors is an integer number (755664).

Almost surely, 2^18999045 is an apocalyptic number.

18999045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18999045 is a deficient number, since it is larger than the sum of its proper divisors (17272827).

18999045 is a wasteful number, since it uses less digits than its factorization.

18999045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762 (or 759 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 18999045 is about 4358.7893961512. The cubic root of 18999045 is about 266.8356940542.

The spelling of 18999045 in words is "eighteen million, nine hundred ninety-nine thousand, forty-five".