18190955 has 8 divisors (see below), whose sum is σ = 22533504. Its totient is φ = 14083200.

The previous prime is 18190919. The next prime is 18190967. The reversal of 18190955 is 55909181.

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

It is not a de Polignac number, because 18190955 - 2⁸ = 18190699 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, 58526 + ... + 58835.

It is an arithmetic number, because the mean of its divisors is an integer number (2816688).

Almost surely, 2^18190955 is an apocalyptic number.

18190955 is a deficient number, since it is larger than the sum of its proper divisors (4342549).

18190955 is a wasteful number, since it uses less digits than its factorization.

18190955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117397.

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 18190955 is about 4265.0855794462. The cubic root of 18190955 is about 262.9976289743.

The spelling of 18190955 in words is "eighteen million, one hundred ninety thousand, nine hundred fifty-five".