18430131 has 8 divisors (see below), whose sum is σ = 24654784. Its totient is φ = 12246120.

The previous prime is 18430123. The next prime is 18430141. The reversal of 18430131 is 13103481.

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

It is not a de Polignac number, because 18430131 - 2³ = 18430123 is a prime.

It is a super-2 number, since 2×18430131² = 679339457354322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18430098 and 18430107.

It is not an unprimeable number, because it can be changed into a prime (18430121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9085 + ... + 10926.

It is an arithmetic number, because the mean of its divisors is an integer number (3081848).

Almost surely, 2^18430131 is an apocalyptic number.

18430131 is a deficient number, since it is larger than the sum of its proper divisors (6224653).

18430131 is a wasteful number, since it uses less digits than its factorization.

18430131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20321.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 18430131 is about 4293.0328440393. The cubic root of 18430131 is about 264.1452512214.

The spelling of 18430131 in words is "eighteen million, four hundred thirty thousand, one hundred thirty-one".