90018036 has 36 divisors (see below), whose sum is σ = 227852352. Its totient is φ = 29965584.

The previous prime is 90018031. The next prime is 90018041. The reversal of 90018036 is 63081009.

It is an interprime number because it is at equal distance from previous prime (90018031) and next prime (90018041).

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90018031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38575 + ... + 40841.

It is an arithmetic number, because the mean of its divisors is an integer number (6329232).

Almost surely, 2^90018036 is an apocalyptic number.

It is an amenable number.

90018036 is an abundant number, since it is smaller than the sum of its proper divisors (137834316).

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

90018036 is a wasteful number, since it uses less digits than its factorization.

90018036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3380 (or 3375 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 90018036 is about 9487.7835135505. The cubic root of 90018036 is about 448.1704084399.

The spelling of 90018036 in words is "ninety million, eighteen thousand, thirty-six".