18291086 has 12 divisors (see below), whose sum is σ = 30158016. Its totient is φ = 8314020.

The previous prime is 18291079. The next prime is 18291089. The reversal of 18291086 is 68019281.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18291089) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37550 + ... + 38033.

It is an arithmetic number, because the mean of its divisors is an integer number (2513168).

Almost surely, 2^18291086 is an apocalyptic number.

18291086 is a deficient number, since it is larger than the sum of its proper divisors (11866930).

18291086 is a wasteful number, since it uses less digits than its factorization.

18291086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75607 (or 75596 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 18291086 is about 4276.8079218034. The cubic root of 18291086 is about 263.4792977385.

The spelling of 18291086 in words is "eighteen million, two hundred ninety-one thousand, eighty-six".