18449669 has 8 divisors (see below), whose sum is σ = 21290880. Its totient is φ = 15659856.

The previous prime is 18449663. The next prime is 18449677. The reversal of 18449669 is 96694481.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18449669 - 2⁸ = 18449413 is a prime.

It is a super-2 number, since 2×18449669² = 680780572419122, 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 (18449663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12074 + ... + 13515.

It is an arithmetic number, because the mean of its divisors is an integer number (2661360).

Almost surely, 2^18449669 is an apocalyptic number.

It is an amenable number.

18449669 is a deficient number, since it is larger than the sum of its proper divisors (2841211).

18449669 is a wasteful number, since it uses less digits than its factorization.

18449669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25699.

The product of its digits is 373248, while the sum is 47.

The square root of 18449669 is about 4295.3077887388. The cubic root of 18449669 is about 264.2385594258.

The spelling of 18449669 in words is "eighteen million, four hundred forty-nine thousand, six hundred sixty-nine".