18486131 has 8 divisors (see below), whose sum is σ = 18861024. Its totient is φ = 18115200.

The previous prime is 18486113. The next prime is 18486133. The reversal of 18486131 is 13168481.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18486131 - 2¹⁰ = 18485107 is a prime.

It is a super-2 number, since 2×18486131² = 683474078698322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18486133) 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, 9515 + ... + 11291.

It is an arithmetic number, because the mean of its divisors is an integer number (2357628).

Almost surely, 2^18486131 is an apocalyptic number.

18486131 is a deficient number, since it is larger than the sum of its proper divisors (374893).

18486131 is a wasteful number, since it uses less digits than its factorization.

18486131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981.

The product of its digits is 4608, while the sum is 32.

The square root of 18486131 is about 4299.5500927423. The cubic root of 18486131 is about 264.4125160486.

The spelling of 18486131 in words is "eighteen million, four hundred eighty-six thousand, one hundred thirty-one".