18855066 has 8 divisors (see below), whose sum is σ = 37710144. Its totient is φ = 6285020.

The previous prime is 18855061. The next prime is 18855071. The reversal of 18855066 is 66055881.

It is an interprime number because it is at equal distance from previous prime (18855061) and next prime (18855071).

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

18855066 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (18855061) 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, 1571250 + ... + 1571261.

It is an arithmetic number, because the mean of its divisors is an integer number (4713768).

Almost surely, 2^18855066 is an apocalyptic number.

18855066 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.

18855066 is a wasteful number, since it uses less digits than its factorization.

18855066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3142516.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 18855066 is about 4342.2420476063. The cubic root of 18855066 is about 266.1599373580.

The spelling of 18855066 in words is "eighteen million, eight hundred fifty-five thousand, sixty-six".