18361834 has 4 divisors (see below), whose sum is σ = 27542754. Its totient is φ = 9180916.

The previous prime is 18361831. The next prime is 18361859. The reversal of 18361834 is 43816381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11055625 + 7306209 = 3325^2 + 2703^2 .

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 18361834.

It is not an unprimeable number, because it can be changed into a prime (18361831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4590457 + ... + 4590460.

Almost surely, 2^18361834 is an apocalyptic number.

18361834 is a deficient number, since it is larger than the sum of its proper divisors (9180920).

18361834 is an equidigital number, since it uses as much as digits as its factorization.

18361834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9180919.

The product of its digits is 13824, while the sum is 34.

The square root of 18361834 is about 4285.0710612544. The cubic root of 18361834 is about 263.8185641172.

The spelling of 18361834 in words is "eighteen million, three hundred sixty-one thousand, eight hundred thirty-four".