18168078 has 16 divisors (see below), whose sum is σ = 36406656. Its totient is φ = 6044280.

The previous prime is 18168071. The next prime is 18168079. The reversal of 18168078 is 87086181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18168071) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 775 + ... + 6077.

It is an arithmetic number, because the mean of its divisors is an integer number (2275416).

Almost surely, 2^18168078 is an apocalyptic number.

18168078 is an abundant number, since it is smaller than the sum of its proper divisors (18238578).

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

18168078 is a wasteful number, since it uses less digits than its factorization.

18168078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5879.

The product of its (nonzero) digits is 21504, while the sum is 39.

The square root of 18168078 is about 4262.4028434675. The cubic root of 18168078 is about 262.8873338544.

The spelling of 18168078 in words is "eighteen million, one hundred sixty-eight thousand, seventy-eight".