181483938220 has 24 divisors (see below), whose sum is σ = 410432907024. Its totient is φ = 67009454016.

The previous prime is 181483938203. The next prime is 181483938247. The reversal of 181483938220 is 22839384181.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349007314 + ... + 349007833.

It is an arithmetic number, because the mean of its divisors is an integer number (17101371126).

Almost surely, 2^181483938220 is an apocalyptic number.

181483938220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181483938220 is an abundant number, since it is smaller than the sum of its proper divisors (228948968804).

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

181483938220 is a wasteful number, since it uses less digits than its factorization.

181483938220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698015169 (or 698015167 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 49.

The spelling of 181483938220 in words is "one hundred eighty-one billion, four hundred eighty-three million, nine hundred thirty-eight thousand, two hundred twenty".