18159842 has 8 divisors (see below), whose sum is σ = 28842156. Its totient is φ = 8545792.

The previous prime is 18159833. The next prime is 18159851. The reversal of 18159842 is 24895181.

It is an interprime number because it is at equal distance from previous prime (18159833) and next prime (18159851).

It can be written as a sum of positive squares in 2 ways, for example, as 18156121 + 3721 = 4261^2 + 61^2 .

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

It is a super-2 number, since 2×18159842² = 659559722929928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18159796 and 18159805.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267023 + ... + 267090.

Almost surely, 2^18159842 is an apocalyptic number.

18159842 is a deficient number, since it is larger than the sum of its proper divisors (10682314).

18159842 is a wasteful number, since it uses less digits than its factorization.

18159842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534132.

The product of its digits is 23040, while the sum is 38.

The square root of 18159842 is about 4261.4366122236. The cubic root of 18159842 is about 262.8476035954.

The spelling of 18159842 in words is "eighteen million, one hundred fifty-nine thousand, eight hundred forty-two".