18311234 has 8 divisors (see below), whose sum is σ = 27877008. Its totient is φ = 9018900.

The previous prime is 18311221. The next prime is 18311239. The reversal of 18311234 is 43211381.

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

It is not an unprimeable number, because it can be changed into a prime (18311239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68192 + ... + 68459.

It is an arithmetic number, because the mean of its divisors is an integer number (3484626).

Almost surely, 2^18311234 is an apocalyptic number.

18311234 is a deficient number, since it is larger than the sum of its proper divisors (9565774).

18311234 is a wasteful number, since it uses less digits than its factorization.

18311234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136720.

The product of its digits is 576, while the sum is 23.

The square root of 18311234 is about 4279.1627685799. The cubic root of 18311234 is about 263.5760048251.

The spelling of 18311234 in words is "eighteen million, three hundred eleven thousand, two hundred thirty-four".