18027629 has 4 divisors (see below), whose sum is σ = 18113280. Its totient is φ = 17941980.

The previous prime is 18027613. The next prime is 18027631. The reversal of 18027629 is 92672081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92672081 = 29 ⋅3195589.

It is a cyclic number.

It is not a de Polignac number, because 18027629 - 2⁴ = 18027613 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18027679) by changing a digit.

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, 42509 + ... + 42930.

It is an arithmetic number, because the mean of its divisors is an integer number (4528320).

Almost surely, 2^18027629 is an apocalyptic number.

It is an amenable number.

18027629 is a deficient number, since it is larger than the sum of its proper divisors (85651).

18027629 is an equidigital number, since it uses as much as digits as its factorization.

18027629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85650.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 18027629 is about 4245.8955474670. The cubic root of 18027629 is about 262.2081606207.

The spelling of 18027629 in words is "eighteen million, twenty-seven thousand, six hundred twenty-nine".