18051768 has 64 divisors (see below), whose sum is σ = 57312000. Its totient is φ = 5157216.

The previous prime is 18051763. The next prime is 18051769. The reversal of 18051768 is 86715081.

18051768 is a `hidden beast` number, since 1 + 80 + 517 + 68 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18051763) 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, 4458 + ... + 7481.

It is an arithmetic number, because the mean of its divisors is an integer number (895500).

Almost surely, 2^18051768 is an apocalyptic number.

18051768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18051768 is an abundant number, since it is smaller than the sum of its proper divisors (39260232).

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

18051768 is a wasteful number, since it uses less digits than its factorization.

18051768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11961 (or 11951 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The square root of 18051768 is about 4248.7372241644. The cubic root of 18051768 is about 262.3251406896.

The spelling of 18051768 in words is "eighteen million, fifty-one thousand, seven hundred sixty-eight".