18311834 has 8 divisors (see below), whose sum is σ = 27918228. Its totient is φ = 9005760.

The previous prime is 18311833. The next prime is 18311857. The reversal of 18311834 is 43811381.

It can be written as a sum of positive squares in 2 ways, for example, as 16200625 + 2111209 = 4025^2 + 1453^2 .

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 = 18311797 and 18311806.

It is not an unprimeable number, because it can be changed into a prime (18311833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74927 + ... + 75170.

Almost surely, 2^18311834 is an apocalyptic number.

18311834 is a deficient number, since it is larger than the sum of its proper divisors (9606394).

18311834 is a wasteful number, since it uses less digits than its factorization.

18311834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150160.

The product of its digits is 2304, while the sum is 29.

The square root of 18311834 is about 4279.2328751775. The cubic root of 18311834 is about 263.5788836385.

The spelling of 18311834 in words is "eighteen million, three hundred eleven thousand, eight hundred thirty-four".