180504480021 has 4 divisors (see below), whose sum is σ = 240672640032. Its totient is φ = 120336320012.

The previous prime is 180504480019. The next prime is 180504480031. The reversal of 180504480021 is 120084405081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 180504480021 - 2¹ = 180504480019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180504480031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30084080001 + ... + 30084080006.

It is an arithmetic number, because the mean of its divisors is an integer number (60168160008).

Almost surely, 2^180504480021 is an apocalyptic number.

It is an amenable number.

180504480021 is a deficient number, since it is larger than the sum of its proper divisors (60168160011).

180504480021 is an equidigital number, since it uses as much as digits as its factorization.

180504480021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60168160010.

The product of its (nonzero) digits is 10240, while the sum is 33.

The spelling of 180504480021 in words is "one hundred eighty billion, five hundred four million, four hundred eighty thousand, twenty-one".