18680002 has 64 divisors (see below), whose sum is σ = 35251200. Its totient is φ = 7318080.

The previous prime is 18679993. The next prime is 18680003. The reversal of 18680002 is 20008681.

It is not an unprimeable number, because it can be changed into a prime (18680003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 278773 + ... + 278839.

It is an arithmetic number, because the mean of its divisors is an integer number (550800).

Almost surely, 2^18680002 is an apocalyptic number.

18680002 is a deficient number, since it is larger than the sum of its proper divisors (16571198).

18680002 is a wasteful number, since it uses less digits than its factorization.

18680002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 18680002 is about 4322.0367883673. The cubic root of 18680002 is about 265.3336346020. Note that the first 3 decimals are identical.

Adding to 18680002 its reverse (20008681), we get a palindrome (38688683).

The spelling of 18680002 in words is "eighteen million, six hundred eighty thousand, two".