181838600220 has 48 divisors (see below), whose sum is σ = 509462835840. Its totient is φ = 48460316736.

The previous prime is 181838600219. The next prime is 181838600239. The reversal of 181838600220 is 22006838181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 838822 + ... + 1033101.

It is an arithmetic number, because the mean of its divisors is an integer number (10613809080).

Almost surely, 2^181838600220 is an apocalyptic number.

181838600220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181838600220 is an abundant number, since it is smaller than the sum of its proper divisors (327624235620).

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

181838600220 is a wasteful number, since it uses less digits than its factorization.

181838600220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873554 (or 1873552 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The spelling of 181838600220 in words is "one hundred eighty-one billion, eight hundred thirty-eight million, six hundred thousand, two hundred twenty".