18881084879 has 4 divisors (see below), whose sum is σ = 19162892184. Its totient is φ = 18599277576.

The previous prime is 18881084863. The next prime is 18881084881. The reversal of 18881084879 is 97848018881.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18881084879 - 2⁴ = 18881084863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18881084179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140903552 + ... + 140903685.

It is an arithmetic number, because the mean of its divisors is an integer number (4790723046).

Almost surely, 2^18881084879 is an apocalyptic number.

18881084879 is a deficient number, since it is larger than the sum of its proper divisors (281807305).

18881084879 is an equidigital number, since it uses as much as digits as its factorization.

18881084879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281807304.

The product of its (nonzero) digits is 8257536, while the sum is 62.

The spelling of 18881084879 in words is "eighteen billion, eight hundred eighty-one million, eighty-four thousand, eight hundred seventy-nine".