18194945 has 8 divisors (see below), whose sum is σ = 21898944. Its totient is φ = 14512624.

The previous prime is 18194903. The next prime is 18194963. The reversal of 18194945 is 54949181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18194945 - 2⁶ = 18194881 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3509 + ... + 6978.

It is an arithmetic number, because the mean of its divisors is an integer number (2737368).

Almost surely, 2^18194945 is an apocalyptic number.

It is an amenable number.

18194945 is a deficient number, since it is larger than the sum of its proper divisors (3703999).

18194945 is a wasteful number, since it uses less digits than its factorization.

18194945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10839.

The product of its digits is 51840, while the sum is 41.

The square root of 18194945 is about 4265.5533052583. The cubic root of 18194945 is about 263.0168561823.

The spelling of 18194945 in words is "eighteen million, one hundred ninety-four thousand, nine hundred forty-five".