18145668 has 24 divisors (see below), whose sum is σ = 42878080. Its totient is φ = 5971680.

The previous prime is 18145661. The next prime is 18145691. The reversal of 18145668 is 86654181.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18145661) 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, 8623 + ... + 10518.

Almost surely, 2^18145668 is an apocalyptic number.

It is an amenable number.

18145668 is an abundant number, since it is smaller than the sum of its proper divisors (24732412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18145668 is a wasteful number, since it uses less digits than its factorization.

18145668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19227 (or 19225 counting only the distinct ones).

The product of its digits is 46080, while the sum is 39.

The square root of 18145668 is about 4259.7732334010. The cubic root of 18145668 is about 262.7792004370.

The spelling of 18145668 in words is "eighteen million, one hundred forty-five thousand, six hundred sixty-eight".