180219021 has 16 divisors (see below), whose sum is σ = 249091200. Its totient is φ = 115763648.

The previous prime is 180218959. The next prime is 180219097. The reversal of 180219021 is 120912081.

It is a cyclic number.

It is not a de Polignac number, because 180219021 - 2⁷ = 180218893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 180218982 and 180219000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180919021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46600 + ... + 50318.

It is an arithmetic number, because the mean of its divisors is an integer number (15568200).

Almost surely, 2^180219021 is an apocalyptic number.

It is an amenable number.

180219021 is a deficient number, since it is larger than the sum of its proper divisors (68872179).

180219021 is a wasteful number, since it uses less digits than its factorization.

180219021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4308.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 180219021 is about 13424.5678142725. The cubic root of 180219021 is about 564.8505318984.

The spelling of 180219021 in words is "one hundred eighty million, two hundred nineteen thousand, twenty-one".