90010018 has 16 divisors (see below), whose sum is σ = 154499904. Its totient is φ = 38526480.

The previous prime is 90010009. The next prime is 90010027. The reversal of 90010018 is 81001009.

It is an interprime number because it is at equal distance from previous prime (90010009) and next prime (90010027).

It is a junction number, because it is equal to n+sod(n) for n = 90009977 and 90010004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8613 + ... + 15943.

It is an arithmetic number, because the mean of its divisors is an integer number (9656244).

Almost surely, 2^90010018 is an apocalyptic number.

90010018 is a deficient number, since it is larger than the sum of its proper divisors (64489886).

90010018 is a wasteful number, since it uses less digits than its factorization.

90010018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8217.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 90010018 is about 9487.3609607730. The cubic root of 90010018 is about 448.1571017102.

Subtracting from 90010018 its reverse (81001009), we obtain a palindrome (9009009).

It can be divided in two parts, 9001001 and 8, that added together give a palindrome (9001009).

The spelling of 90010018 in words is "ninety million, ten thousand, eighteen".