1881142218 has 56 divisors (see below), whose sum is σ = 4241714400. Its totient is φ = 625406184.

The previous prime is 1881142189. The next prime is 1881142229. The reversal of 1881142218 is 8122411881.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 638593 + ... + 641531.

It is an arithmetic number, because the mean of its divisors is an integer number (75744900).

Almost surely, 2^1881142218 is an apocalyptic number.

1881142218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1881142218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2120857200).

1881142218 is an abundant number, since it is smaller than the sum of its proper divisors (2360572182).

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

1881142218 is an equidigital number, since it uses as much as digits as its factorization.

1881142218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3398 (or 3383 counting only the distinct ones).

The product of its digits is 8192, while the sum is 36.

The square root of 1881142218 is about 43372.1364242067. The cubic root of 1881142218 is about 1234.4510595085.

The spelling of 1881142218 in words is "one billion, eight hundred eighty-one million, one hundred forty-two thousand, two hundred eighteen".