18144898 has 4 divisors (see below), whose sum is σ = 27217350. Its totient is φ = 9072448.

The previous prime is 18144887. The next prime is 18144901. The reversal of 18144898 is 89844181.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12794929 + 5349969 = 3577^2 + 2313^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4536223 + ... + 4536226.

Almost surely, 2^18144898 is an apocalyptic number.

18144898 is a deficient number, since it is larger than the sum of its proper divisors (9072452).

18144898 is an equidigital number, since it uses as much as digits as its factorization.

18144898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9072451.

The product of its digits is 73728, while the sum is 43.

The square root of 18144898 is about 4259.6828520443. The cubic root of 18144898 is about 262.7754834278.

The spelling of 18144898 in words is "eighteen million, one hundred forty-four thousand, eight hundred ninety-eight".