18019475 has 6 divisors (see below), whose sum is σ = 22344180. Its totient is φ = 14415560.

The previous prime is 18019457. The next prime is 18019489. The reversal of 18019475 is 57491081.

It is not a de Polignac number, because 18019475 - 2¹² = 18015379 is a prime.

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, 360365 + ... + 360414.

It is an arithmetic number, because the mean of its divisors is an integer number (3724030).

Almost surely, 2^18019475 is an apocalyptic number.

18019475 is a deficient number, since it is larger than the sum of its proper divisors (4324705).

18019475 is an equidigital number, since it uses as much as digits as its factorization.

18019475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720789 (or 720784 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 18019475 is about 4244.9352174091. The cubic root of 18019475 is about 262.1686219072.

The spelling of 18019475 in words is "eighteen million, nineteen thousand, four hundred seventy-five".