18020108 has 12 divisors (see below), whose sum is σ = 31565352. Its totient is φ = 9001440.

The previous prime is 18020089. The next prime is 18020111. The reversal of 18020108 is 80102081.

It is a self number, because there is not a number n which added to its sum of digits gives 18020108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5888 + ... + 8408.

It is an arithmetic number, because the mean of its divisors is an integer number (2630446).

Almost surely, 2^18020108 is an apocalyptic number.

It is an amenable number.

18020108 is a deficient number, since it is larger than the sum of its proper divisors (13545244).

18020108 is a wasteful number, since it uses less digits than its factorization.

18020108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4312 (or 4310 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 18020108 is about 4245.0097761960. The cubic root of 18020108 is about 262.1716917487.

Adding to 18020108 its reverse (80102081), we get a palindrome (98122189).

The spelling of 18020108 in words is "eighteen million, twenty thousand, one hundred eight".