18020097 has 16 divisors (see below), whose sum is σ = 27000000. Its totient is φ = 11876832.

The previous prime is 18020089. The next prime is 18020111. The reversal of 18020097 is 79002081.

It is not a de Polignac number, because 18020097 - 2³ = 18020089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 18020097.

It is not an unprimeable number, because it can be changed into a prime (18020027) by changing a digit.

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, 1347 + ... + 6152.

It is an arithmetic number, because the mean of its divisors is an integer number (1687500).

Almost surely, 2^18020097 is an apocalyptic number.

It is an amenable number.

18020097 is a deficient number, since it is larger than the sum of its proper divisors (8979903).

18020097 is an equidigital number, since it uses as much as digits as its factorization.

18020097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7597 (or 7591 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 18020097 is about 4245.0084805569. The cubic root of 18020097 is about 262.1716384029.

The spelling of 18020097 in words is "eighteen million, twenty thousand, ninety-seven".