181848516820 has 12 divisors (see below), whose sum is σ = 381881885364. Its totient is φ = 72739406720.

The previous prime is 181848516793. The next prime is 181848516841. The reversal of 181848516820 is 28615848181.

It can be written as a sum of positive squares in 2 ways, for example, as 69651655056 + 112196861764 = 263916^2 + 334958^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4546212901 + ... + 4546212940.

It is an arithmetic number, because the mean of its divisors is an integer number (31823490447).

Almost surely, 2^181848516820 is an apocalyptic number.

181848516820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181848516820 is an abundant number, since it is smaller than the sum of its proper divisors (200033368544).

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

181848516820 is a wasteful number, since it uses less digits than its factorization.

181848516820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9092425850 (or 9092425848 counting only the distinct ones).

The product of its (nonzero) digits is 983040, while the sum is 52.

The spelling of 181848516820 in words is "one hundred eighty-one billion, eight hundred forty-eight million, five hundred sixteen thousand, eight hundred twenty".