180021085 has 8 divisors (see below), whose sum is σ = 216274176. Its totient is φ = 143850960.

The previous prime is 180021073. The next prime is 180021089. The reversal of 180021085 is 580120081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 180021085 - 2⁵ = 180021053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180021089) 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, 15861 + ... + 24730.

It is an arithmetic number, because the mean of its divisors is an integer number (27034272).

Almost surely, 2^180021085 is an apocalyptic number.

It is an amenable number.

180021085 is a deficient number, since it is larger than the sum of its proper divisors (36253091).

180021085 is an equidigital number, since it uses as much as digits as its factorization.

180021085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41483.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 180021085 is about 13417.1936335435. The cubic root of 180021085 is about 564.6436628508.

The spelling of 180021085 in words is "one hundred eighty million, twenty-one thousand, eighty-five".