18144886 has 8 divisors (see below), whose sum is σ = 28649880. Its totient is φ = 8594928.

The previous prime is 18144883. The next prime is 18144887. The reversal of 18144886 is 68844181.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18144881) 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, 238711 + ... + 238786.

It is an arithmetic number, because the mean of its divisors is an integer number (3581235).

Almost surely, 2^18144886 is an apocalyptic number.

18144886 is a deficient number, since it is larger than the sum of its proper divisors (10504994).

18144886 is a wasteful number, since it uses less digits than its factorization.

18144886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477518.

The product of its digits is 49152, while the sum is 40.

The square root of 18144886 is about 4259.6814434885. The cubic root of 18144886 is about 262.7754254995.

The spelling of 18144886 in words is "eighteen million, one hundred forty-four thousand, eight hundred eighty-six".