18871882 has 4 divisors (see below), whose sum is σ = 28307826. Its totient is φ = 9435940.

The previous prime is 18871873. The next prime is 18871889. The reversal of 18871882 is 28817881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28817881 = 337 ⋅85513.

It can be written as a sum of positive squares in only one way, i.e., 9865881 + 9006001 = 3141^2 + 3001^2 .

It is a super-2 number, since 2×18871882² = 712295860443848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18871889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4717969 + ... + 4717972.

Almost surely, 2^18871882 is an apocalyptic number.

18871882 is a deficient number, since it is larger than the sum of its proper divisors (9435944).

18871882 is an equidigital number, since it uses as much as digits as its factorization.

18871882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9435943.

The product of its digits is 57344, while the sum is 43.

The square root of 18871882 is about 4344.1779429485. The cubic root of 18871882 is about 266.2390392749.

The spelling of 18871882 in words is "eighteen million, eight hundred seventy-one thousand, eight hundred eighty-two".