18394975 has 12 divisors (see below), whose sum is σ = 23241816. Its totient is φ = 14437280.

The previous prime is 18394967. The next prime is 18394993. The reversal of 18394975 is 57949381.

It is a happy number.

It is not a de Polignac number, because 18394975 - 2³ = 18394967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5617 + ... + 8266.

It is an arithmetic number, because the mean of its divisors is an integer number (1936818).

Almost surely, 2^18394975 is an apocalyptic number.

18394975 is a deficient number, since it is larger than the sum of its proper divisors (4846841).

18394975 is a wasteful number, since it uses less digits than its factorization.

18394975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13946 (or 13941 counting only the distinct ones).

The product of its digits is 272160, while the sum is 46.

The square root of 18394975 is about 4288.9363483269. The cubic root of 18394975 is about 263.9771894509.

The spelling of 18394975 in words is "eighteen million, three hundred ninety-four thousand, nine hundred seventy-five".