18159434 has 8 divisors (see below), whose sum is σ = 28841508. Its totient is φ = 8545600.

The previous prime is 18159431. The next prime is 18159461. The reversal of 18159434 is 43495181.

It can be written as a sum of positive squares in 2 ways, for example, as 17247409 + 912025 = 4153^2 + 955^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 18159394 and 18159403.

It is not an unprimeable number, because it can be changed into a prime (18159431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267017 + ... + 267084.

Almost surely, 2^18159434 is an apocalyptic number.

18159434 is a deficient number, since it is larger than the sum of its proper divisors (10682074).

18159434 is a wasteful number, since it uses less digits than its factorization.

18159434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534120.

The product of its digits is 17280, while the sum is 35.

The square root of 18159434 is about 4261.3887407745. The cubic root of 18159434 is about 262.8456351013.

The spelling of 18159434 in words is "eighteen million, one hundred fifty-nine thousand, four hundred thirty-four".