18090143 has 16 divisors (see below), whose sum is σ = 19633152. Its totient is φ = 16632000.

The previous prime is 18090097. The next prime is 18090157. The reversal of 18090143 is 34109081.

It is a cyclic number.

It is not a de Polignac number, because 18090143 - 2¹⁰ = 18089119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18090173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54488 + ... + 54818.

It is an arithmetic number, because the mean of its divisors is an integer number (1227072).

Almost surely, 2^18090143 is an apocalyptic number.

18090143 is a deficient number, since it is larger than the sum of its proper divisors (1543009).

18090143 is a wasteful number, since it uses less digits than its factorization.

18090143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 18090143 is about 4253.2508743313. The cubic root of 18090143 is about 262.5108953905.

The spelling of 18090143 in words is "eighteen million, ninety thousand, one hundred forty-three".