18099429 has 4 divisors (see below), whose sum is σ = 24132576. Its totient is φ = 12066284.

The previous prime is 18099379. The next prime is 18099437. The reversal of 18099429 is 92499081.

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: 92499081 = 3 ⋅30833027.

It is a cyclic number.

It is not a de Polignac number, because 18099429 - 2¹¹ = 18097381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18099479) 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, 3016569 + ... + 3016574.

It is an arithmetic number, because the mean of its divisors is an integer number (6033144).

Almost surely, 2^18099429 is an apocalyptic number.

It is an amenable number.

18099429 is a deficient number, since it is larger than the sum of its proper divisors (6033147).

18099429 is an equidigital number, since it uses as much as digits as its factorization.

18099429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6033146.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 18099429 is about 4254.3423698616. The cubic root of 18099429 is about 262.5558049156. Note that the first 3 decimals are identical.

It can be divided in two parts, 18099 and 429, that added together give a triangular number (18528 = T₁₉₂).

The spelling of 18099429 in words is "eighteen million, ninety-nine thousand, four hundred twenty-nine".