18148889 has 8 divisors (see below), whose sum is σ = 19850880. Its totient is φ = 16455600.

The previous prime is 18148873. The next prime is 18148901. The reversal of 18148889 is 98884181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18148889 - 2⁴ = 18148873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18148849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2672 + ... + 6590.

It is an arithmetic number, because the mean of its divisors is an integer number (2481360).

Almost surely, 2^18148889 is an apocalyptic number.

It is an amenable number.

18148889 is a deficient number, since it is larger than the sum of its proper divisors (1701991).

18148889 is a wasteful number, since it uses less digits than its factorization.

18148889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4351.

The product of its digits is 147456, while the sum is 47.

The square root of 18148889 is about 4260.1512883934. The cubic root of 18148889 is about 262.7947479813.

The spelling of 18148889 in words is "eighteen million, one hundred forty-eight thousand, eight hundred eighty-nine".