18017950 has 24 divisors (see below), whose sum is σ = 33723288. Its totient is φ = 7162080.

The previous prime is 18017941. The next prime is 18017953. The reversal of 18017950 is 5971081.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18017953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7609 + ... + 9691.

It is an arithmetic number, because the mean of its divisors is an integer number (1405137).

Almost surely, 2^18017950 is an apocalyptic number.

18017950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18017950 is a deficient number, since it is larger than the sum of its proper divisors (15705338).

18017950 is a wasteful number, since it uses less digits than its factorization.

18017950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2268 (or 2263 counting only the distinct ones).

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

The square root of 18017950 is about 4244.7555877812. The cubic root of 18017950 is about 262.1612258644.

The spelling of 18017950 in words is "eighteen million, seventeen thousand, nine hundred fifty".