18993065 has 40 divisors (see below), whose sum is σ = 29703360. Its totient is φ = 11389248.

The previous prime is 18993053. The next prime is 18993089. The reversal of 18993065 is 56039981.

It is not a de Polignac number, because 18993065 - 2⁶ = 18993001 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 999626 + ... + 999644.

It is an arithmetic number, because the mean of its divisors is an integer number (742584).

Almost surely, 2^18993065 is an apocalyptic number.

It is an amenable number.

18993065 is a deficient number, since it is larger than the sum of its proper divisors (10710295).

18993065 is an frugal number, since it uses more digits than its factorization.

18993065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 18993065 is about 4358.1033718809. The cubic root of 18993065 is about 266.8076953680.

The spelling of 18993065 in words is "eighteen million, nine hundred ninety-three thousand, sixty-five".