18142689 has 16 divisors (see below), whose sum is σ = 26212032. Its totient is φ = 11117568.

The previous prime is 18142673. The next prime is 18142693. The reversal of 18142689 is 98624181.

It is not a de Polignac number, because 18142689 - 2⁴ = 18142673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18142609) 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, 1944 + ... + 6329.

It is an arithmetic number, because the mean of its divisors is an integer number (1638252).

Almost surely, 2^18142689 is an apocalyptic number.

It is an amenable number.

18142689 is a deficient number, since it is larger than the sum of its proper divisors (8069343).

18142689 is a wasteful number, since it uses less digits than its factorization.

18142689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8336.

The product of its digits is 27648, while the sum is 39.

The square root of 18142689 is about 4259.4235525479. The cubic root of 18142689 is about 262.7648193722.

The spelling of 18142689 in words is "eighteen million, one hundred forty-two thousand, six hundred eighty-nine".