18246189 has 16 divisors (see below), whose sum is σ = 26841024. Its totient is φ = 10953600.

The previous prime is 18246181. The next prime is 18246209. The reversal of 18246189 is 98164281.

18246189 = 647² + 648² + ... + 687².

It is not a de Polignac number, because 18246189 - 2³ = 18246181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18246181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4107 + ... + 7304.

It is an arithmetic number, because the mean of its divisors is an integer number (1677564).

Almost surely, 2^18246189 is an apocalyptic number.

It is an amenable number.

18246189 is a deficient number, since it is larger than the sum of its proper divisors (8594835).

18246189 is a wasteful number, since it uses less digits than its factorization.

18246189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11468.

The product of its digits is 27648, while the sum is 39.

The square root of 18246189 is about 4271.5558055584. Note that the first 3 decimals coincide. The cubic root of 18246189 is about 263.2635437910.

The spelling of 18246189 in words is "eighteen million, two hundred forty-six thousand, one hundred eighty-nine".