180515020 has 36 divisors (see below), whose sum is σ = 440974800. Its totient is φ = 61890528.

The previous prime is 180515011. The next prime is 180515039. The reversal of 180515020 is 20515081.

It is a junction number, because it is equal to n+sod(n) for n = 180514982 and 180515000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91120 + ... + 93079.

It is an arithmetic number, because the mean of its divisors is an integer number (12249300).

Almost surely, 2^180515020 is an apocalyptic number.

180515020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

180515020 is an abundant number, since it is smaller than the sum of its proper divisors (260459780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

180515020 is a wasteful number, since it uses less digits than its factorization.

180515020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184222 (or 184213 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 180515020 is about 13435.5878174347. The cubic root of 180515020 is about 565.1596071911.

The spelling of 180515020 in words is "one hundred eighty million, five hundred fifteen thousand, twenty".