18429089 has 4 divisors (see below), whose sum is σ = 21061824. Its totient is φ = 15796356.

The previous prime is 18429083. The next prime is 18429091. The reversal of 18429089 is 98092481.

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: 98092481 = 4261 ⋅23021.

It is a cyclic number.

It is not a de Polignac number, because 18429089 - 2²⁰ = 17380513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18429083) 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, 1316357 + ... + 1316370.

It is an arithmetic number, because the mean of its divisors is an integer number (5265456).

Almost surely, 2^18429089 is an apocalyptic number.

It is an amenable number.

18429089 is a deficient number, since it is larger than the sum of its proper divisors (2632735).

18429089 is an equidigital number, since it uses as much as digits as its factorization.

18429089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2632734.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 18429089 is about 4292.9114828983. The cubic root of 18429089 is about 264.1402730593.

The spelling of 18429089 in words is "eighteen million, four hundred twenty-nine thousand, eighty-nine".