18910075 has 6 divisors (see below), whose sum is σ = 23448524. Its totient is φ = 15128040.

The previous prime is 18910063. The next prime is 18910091. The reversal of 18910075 is 57001981.

It is a de Polignac number, because none of the positive numbers 2^k-18910075 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 378177 + ... + 378226.

Almost surely, 2^18910075 is an apocalyptic number.

18910075 is a deficient number, since it is larger than the sum of its proper divisors (4538449).

18910075 is an equidigital number, since it uses as much as digits as its factorization.

18910075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756413 (or 756408 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 18910075 is about 4348.5716045617. The cubic root of 18910075 is about 266.4185235055.

The spelling of 18910075 in words is "eighteen million, nine hundred ten thousand, seventy-five".