90806018 has 16 divisors (see below), whose sum is σ = 142896960. Its totient is φ = 43218000.

The previous prime is 90806011. The next prime is 90806033. The reversal of 90806018 is 81060809.

It is not an unprimeable number, because it can be changed into a prime (90806011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6908 + ... + 15143.

It is an arithmetic number, because the mean of its divisors is an integer number (8931060).

Almost surely, 2^90806018 is an apocalyptic number.

90806018 is a deficient number, since it is larger than the sum of its proper divisors (52090942).

90806018 is a wasteful number, since it uses less digits than its factorization.

90806018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22153.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 90806018 is about 9529.2191705302. The cubic root of 90806018 is about 449.4743128838.

The spelling of 90806018 in words is "ninety million, eight hundred six thousand, eighteen".