18898149 has 4 divisors (see below), whose sum is σ = 25197536. Its totient is φ = 12598764.

The previous prime is 18898147. The next prime is 18898151. The reversal of 18898149 is 94189881.

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 an interprime number because it is at equal distance from previous prime (18898147) and next prime (18898151).

It is not a de Polignac number, because 18898149 - 2¹ = 18898147 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18898098 and 18898107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18898147) 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, 3149689 + ... + 3149694.

It is an arithmetic number, because the mean of its divisors is an integer number (6299384).

Almost surely, 2^18898149 is an apocalyptic number.

It is an amenable number.

18898149 is a deficient number, since it is larger than the sum of its proper divisors (6299387).

18898149 is an equidigital number, since it uses as much as digits as its factorization.

18898149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6299386.

The product of its digits is 165888, while the sum is 48.

The square root of 18898149 is about 4347.2001334192. The cubic root of 18898149 is about 266.3625044172.

The spelling of 18898149 in words is "eighteen million, eight hundred ninety-eight thousand, one hundred forty-nine".