180600021 has 12 divisors (see below), whose sum is σ = 298133472. Its totient is φ = 103199976.

The previous prime is 180599999. The next prime is 180600047. The reversal of 180600021 is 120006081.

It is not a de Polignac number, because 180600021 - 2⁵ = 180599989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 180599967 and 180600003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180800021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1433271 + ... + 1433396.

It is an arithmetic number, because the mean of its divisors is an integer number (24844456).

Almost surely, 2^180600021 is an apocalyptic number.

It is an amenable number.

180600021 is a deficient number, since it is larger than the sum of its proper divisors (117533451).

180600021 is a wasteful number, since it uses less digits than its factorization.

180600021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2866680 (or 2866677 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 180600021 is about 13438.7507231885. The cubic root of 180600021 is about 565.2483008143.

The spelling of 180600021 in words is "one hundred eighty million, six hundred thousand, twenty-one".