18654131 has 4 divisors (see below), whose sum is σ = 19087992. Its totient is φ = 18220272.

The previous prime is 18654121. The next prime is 18654137. The reversal of 18654131 is 13145681.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18654131 - 2¹⁸ = 18391987 is a prime.

It is a super-2 number, since 2×18654131² = 695953206730322, 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 = 18654094 and 18654103.

It is not an unprimeable number, because it can be changed into a prime (18654137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216866 + ... + 216951.

It is an arithmetic number, because the mean of its divisors is an integer number (4771998).

Almost surely, 2^18654131 is an apocalyptic number.

18654131 is a deficient number, since it is larger than the sum of its proper divisors (433861).

18654131 is an equidigital number, since it uses as much as digits as its factorization.

18654131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433860.

The product of its digits is 2880, while the sum is 29.

The square root of 18654131 is about 4319.0428337769. The cubic root of 18654131 is about 265.2110861161.

The spelling of 18654131 in words is "eighteen million, six hundred fifty-four thousand, one hundred thirty-one".