2181327378 has 32 divisors (see below), whose sum is σ = 4485307200. Its totient is φ = 706708800.

The previous prime is 2181327353. The next prime is 2181327419. The reversal of 2181327378 is 8737231812.

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, 228648 + ... + 237996.

It is an arithmetic number, because the mean of its divisors is an integer number (140165850).

Almost surely, 2^2181327378 is an apocalyptic number.

2181327378 is an abundant number, since it is smaller than the sum of its proper divisors (2303979822).

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

2181327378 is a wasteful number, since it uses less digits than its factorization.

2181327378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10442.

The product of its digits is 112896, while the sum is 42.

The square root of 2181327378 is about 46704.6826132027. The cubic root of 2181327378 is about 1296.9013731651.

The spelling of 2181327378 in words is "two billion, one hundred eighty-one million, three hundred twenty-seven thousand, three hundred seventy-eight".