180019800 has 384 divisors, whose sum is σ = 687009600. Its totient is φ = 43130880.

The previous prime is 180019793. The next prime is 180019831. The reversal of 180019800 is 8910081.

180019800 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3396574 + ... + 3396626.

Almost surely, 2^180019800 is an apocalyptic number.

180019800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 180019800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343504800).

180019800 is an abundant number, since it is smaller than the sum of its proper divisors (506989800).

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

180019800 is a wasteful number, since it uses less digits than its factorization.

180019800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 180019800 is about 13417.1457471401. The cubic root of 180019800 is about 564.6423193622.

Adding to 180019800 its reverse (8910081), we get a palindrome (188929881).

The spelling of 180019800 in words is "one hundred eighty million, nineteen thousand, eight hundred".