18807066 has 40 divisors (see below), whose sum is σ = 44627220. Its totient is φ = 5899392.

The previous prime is 18807059. The next prime is 18807067. The reversal of 18807066 is 66070881.

It can be written as a sum of positive squares in 2 ways, for example, as 18275625 + 531441 = 4275^2 + 729^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18807066.

It is not an unprimeable number, because it can be changed into a prime (18807067) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 661 + ... + 6168.

Almost surely, 2^18807066 is an apocalyptic number.

18807066 is an abundant number, since it is smaller than the sum of its proper divisors (25820154).

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

18807066 is a wasteful number, since it uses less digits than its factorization.

18807066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6860 (or 6851 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 18807066 is about 4336.7114268764. The cubic root of 18807066 is about 265.9338878794.

The spelling of 18807066 in words is "eighteen million, eight hundred seven thousand, sixty-six".