18484289 has 4 divisors (see below), whose sum is σ = 18498480. Its totient is φ = 18470100.

The previous prime is 18484273. The next prime is 18484307. The reversal of 18484289 is 98248481.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 18484289 - 2⁴ = 18484273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18484229) 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, 4919 + ... + 7820.

It is an arithmetic number, because the mean of its divisors is an integer number (4624620).

Almost surely, 2^18484289 is an apocalyptic number.

It is an amenable number.

18484289 is a deficient number, since it is larger than the sum of its proper divisors (14191).

18484289 is a wasteful number, since it uses less digits than its factorization.

18484289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14190.

The product of its digits is 147456, while the sum is 44.

The square root of 18484289 is about 4299.3358789469. The cubic root of 18484289 is about 264.4037335360.

The spelling of 18484289 in words is "eighteen million, four hundred eighty-four thousand, two hundred eighty-nine".