18229169 has 4 divisors (see below), whose sum is σ = 20833344. Its totient is φ = 15624996.

The previous prime is 18229157. The next prime is 18229177. The reversal of 18229169 is 96192281.

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.

It is a cyclic number.

It is not a de Polignac number, because 18229169 - 2²⁰ = 17180593 is a prime.

It is a super-2 number, since 2×18229169² = 664605204861122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18229109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1302077 + ... + 1302090.

It is an arithmetic number, because the mean of its divisors is an integer number (5208336).

Almost surely, 2^18229169 is an apocalyptic number.

It is an amenable number.

18229169 is a deficient number, since it is larger than the sum of its proper divisors (2604175).

18229169 is an equidigital number, since it uses as much as digits as its factorization.

18229169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2604174.

The product of its digits is 15552, while the sum is 38.

The square root of 18229169 is about 4269.5630924018. The cubic root of 18229169 is about 263.1816611314.

The spelling of 18229169 in words is "eighteen million, two hundred twenty-nine thousand, one hundred sixty-nine".