180020986 has 16 divisors (see below), whose sum is σ = 274827168. Its totient is φ = 88426000.

The previous prime is 180020969. The next prime is 180020989. The reversal of 180020986 is 689020081.

It is not an unprimeable number, because it can be changed into a prime (180020989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23061 + ... + 29863.

It is an arithmetic number, because the mean of its divisors is an integer number (17176698).

Almost surely, 2^180020986 is an apocalyptic number.

180020986 is a deficient number, since it is larger than the sum of its proper divisors (94806182).

180020986 is a wasteful number, since it uses less digits than its factorization.

180020986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7037.

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

The square root of 180020986 is about 13417.1899442469. The cubic root of 180020986 is about 564.6435593449.

The spelling of 180020986 in words is "one hundred eighty million, twenty thousand, nine hundred eighty-six".