18311434 has 8 divisors (see below), whose sum is σ = 27502848. Its totient is φ = 9143820.

The previous prime is 18311429. The next prime is 18311453. The reversal of 18311434 is 43411381.

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 = 18311399 and 18311408.

It is an unprimeable number.

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, 3882 + ... + 7189.

It is an arithmetic number, because the mean of its divisors is an integer number (3437856).

Almost surely, 2^18311434 is an apocalyptic number.

18311434 is a deficient number, since it is larger than the sum of its proper divisors (9191414).

18311434 is a wasteful number, since it uses less digits than its factorization.

18311434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11900.

The product of its digits is 1152, while the sum is 25.

The square root of 18311434 is about 4279.1861375734. The cubic root of 18311434 is about 263.5769644365.

The spelling of 18311434 in words is "eighteen million, three hundred eleven thousand, four hundred thirty-four".