18312434 has 16 divisors (see below), whose sum is σ = 33239808. Its totient is φ = 7386432.

The previous prime is 18312431. The next prime is 18312457. The reversal of 18312434 is 43421381.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18312431) 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, 38234 + ... + 38709.

It is an arithmetic number, because the mean of its divisors is an integer number (2077488).

Almost surely, 2^18312434 is an apocalyptic number.

18312434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18312434 is a deficient number, since it is larger than the sum of its proper divisors (14927374).

18312434 is a wasteful number, since it uses less digits than its factorization.

18312434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76969.

The product of its digits is 2304, while the sum is 26.

The square root of 18312434 is about 4279.3029806266. The cubic root of 18312434 is about 263.5817623890.

The spelling of 18312434 in words is "eighteen million, three hundred twelve thousand, four hundred thirty-four".