18129419 has 8 divisors (see below), whose sum is σ = 22603008. Its totient is φ = 14126760.

The previous prime is 18129413. The next prime is 18129427. The reversal of 18129419 is 91492181.

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 18129419 - 2¹⁶ = 18063883 is a prime.

It is a super-2 number, since 2×18129419² = 657351666555122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18129413) 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, 117647 + ... + 117800.

It is an arithmetic number, because the mean of its divisors is an integer number (2825376).

Almost surely, 2^18129419 is an apocalyptic number.

18129419 is a deficient number, since it is larger than the sum of its proper divisors (4473589).

18129419 is a wasteful number, since it uses less digits than its factorization.

18129419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235465.

The product of its digits is 5184, while the sum is 35.

The square root of 18129419 is about 4257.8655450824. The cubic root of 18129419 is about 262.7007395726.

The spelling of 18129419 in words is "eighteen million, one hundred twenty-nine thousand, four hundred nineteen".