18020766 has 8 divisors (see below), whose sum is σ = 36041544. Its totient is φ = 6006920.

The previous prime is 18020747. The next prime is 18020767. The reversal of 18020766 is 66702081.

It is a happy number.

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

18020766 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18020767) 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, 1501725 + ... + 1501736.

It is an arithmetic number, because the mean of its divisors is an integer number (4505193).

Almost surely, 2^18020766 is an apocalyptic number.

18020766 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18020766 is a wasteful number, since it uses less digits than its factorization.

18020766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3003466.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 18020766 is about 4245.0872782547. The cubic root of 18020766 is about 262.1748827557.

The spelling of 18020766 in words is "eighteen million, twenty thousand, seven hundred sixty-six".