18143091 has 12 divisors (see below), whose sum is σ = 27052480. Its totient is φ = 11705040.

The previous prime is 18143089. The next prime is 18143101. The reversal of 18143091 is 19034181.

It is not a de Polignac number, because 18143091 - 2¹ = 18143089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18143051) 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, 32236 + ... + 32793.

Almost surely, 2^18143091 is an apocalyptic number.

18143091 is a deficient number, since it is larger than the sum of its proper divisors (8909389).

18143091 is a wasteful number, since it uses less digits than its factorization.

18143091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65066 (or 65063 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 18143091 is about 4259.4707417706. The cubic root of 18143091 is about 262.7667601113.

The spelling of 18143091 in words is "eighteen million, one hundred forty-three thousand, ninety-one".