18131834 has 8 divisors (see below), whose sum is σ = 31083168. Its totient is φ = 7770780.

The previous prime is 18131831. The next prime is 18131857. The reversal of 18131834 is 43813181.

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 = 18131797 and 18131806.

It is not an unprimeable number, because it can be changed into a prime (18131831) 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, 647552 + ... + 647579.

It is an arithmetic number, because the mean of its divisors is an integer number (3885396).

Almost surely, 2^18131834 is an apocalyptic number.

18131834 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18131834 is a deficient number, since it is larger than the sum of its proper divisors (12951334).

18131834 is a wasteful number, since it uses less digits than its factorization.

18131834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295140.

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

The square root of 18131834 is about 4258.1491284360. The cubic root of 18131834 is about 262.7124037470.

The spelling of 18131834 in words is "eighteen million, one hundred thirty-one thousand, eight hundred thirty-four".