18206980 has 24 divisors (see below), whose sum is σ = 41711040. Its totient is φ = 6620640.

The previous prime is 18206977. The next prime is 18206999. The reversal of 18206980 is 8960281.

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, 41160 + ... + 41599.

It is an arithmetic number, because the mean of its divisors is an integer number (1737960).

Almost surely, 2^18206980 is an apocalyptic number.

18206980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18206980 is an abundant number, since it is smaller than the sum of its proper divisors (23504060).

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

18206980 is a wasteful number, since it uses less digits than its factorization.

18206980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82779 (or 82777 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 18206980 is about 4266.9637917376. The cubic root of 18206980 is about 263.0748340108.

The spelling of 18206980 in words is "eighteen million, two hundred six thousand, nine hundred eighty".