18149669 has 4 divisors (see below), whose sum is σ = 18184896. Its totient is φ = 18114444.

The previous prime is 18149653. The next prime is 18149701. The reversal of 18149669 is 96694181.

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 18149669 - 2⁴ = 18149653 is a prime.

It is a super-2 number, since 2×18149669² = 658820969619122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18149609) 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, 16829 + ... + 17874.

It is an arithmetic number, because the mean of its divisors is an integer number (4546224).

Almost surely, 2^18149669 is an apocalyptic number.

It is an amenable number.

18149669 is a deficient number, since it is larger than the sum of its proper divisors (35227).

18149669 is an equidigital number, since it uses as much as digits as its factorization.

18149669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35226.

The product of its digits is 93312, while the sum is 44.

The square root of 18149669 is about 4260.2428334544. The cubic root of 18149669 is about 262.7985127106.

The spelling of 18149669 in words is "eighteen million, one hundred forty-nine thousand, six hundred sixty-nine".