18134786 has 4 divisors (see below), whose sum is σ = 27202182. Its totient is φ = 9067392.

The previous prime is 18134761. The next prime is 18134789. The reversal of 18134786 is 68743181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68743181 = 13 ⋅5287937.

It can be written as a sum of positive squares in only one way, i.e., 13184161 + 4950625 = 3631^2 + 2225^2 .

It is not an unprimeable number, because it can be changed into a prime (18134789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4533695 + ... + 4533698.

Almost surely, 2^18134786 is an apocalyptic number.

18134786 is a deficient number, since it is larger than the sum of its proper divisors (9067396).

18134786 is an equidigital number, since it uses as much as digits as its factorization.

18134786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9067395.

The product of its digits is 32256, while the sum is 38.

The square root of 18134786 is about 4258.4957438044. The cubic root of 18134786 is about 262.7266601635.

The spelling of 18134786 in words is "eighteen million, one hundred thirty-four thousand, seven hundred eighty-six".