18429189 has 4 divisors (see below), whose sum is σ = 24572256. Its totient is φ = 12286124.

The previous prime is 18429161. The next prime is 18429193. The reversal of 18429189 is 98192481.

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: 98192481 = 3 ⋅32730827.

It is a cyclic number.

It is not a de Polignac number, because 18429189 - 2¹¹ = 18427141 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18429189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18429119) 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, 3071529 + ... + 3071534.

It is an arithmetic number, because the mean of its divisors is an integer number (6143064).

Almost surely, 2^18429189 is an apocalyptic number.

It is an amenable number.

18429189 is a deficient number, since it is larger than the sum of its proper divisors (6143067).

18429189 is an equidigital number, since it uses as much as digits as its factorization.

18429189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6143066.

The product of its digits is 41472, while the sum is 42.

The square root of 18429189 is about 4292.9231299896. The cubic root of 18429189 is about 264.1407508181.

The spelling of 18429189 in words is "eighteen million, four hundred twenty-nine thousand, one hundred eighty-nine".