30090018 has 32 divisors (see below), whose sum is σ = 70185600. Its totient is φ = 8596560.

The previous prime is 30090001. The next prime is 30090031. The reversal of 30090018 is 81009003.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 30089976 and 30090003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5253 + ... + 9368.

It is an arithmetic number, because the mean of its divisors is an integer number (2193300).

Almost surely, 2^30090018 is an apocalyptic number.

30090018 is an abundant number, since it is smaller than the sum of its proper divisors (40095582).

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

30090018 is a wasteful number, since it uses less digits than its factorization.

30090018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14647 (or 14633 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 30090018 is about 5485.4369014692. The cubic root of 30090018 is about 311.0337256602.

The spelling of 30090018 in words is "thirty million, ninety thousand, eighteen".