18881084863 has 2 divisors, whose sum is σ = 18881084864. Its totient is φ = 18881084862.

The previous prime is 18881084861. The next prime is 18881084881. The reversal of 18881084863 is 36848018881.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18881084863 - 2¹ = 18881084861 is a prime.

Together with 18881084861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18881084861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9440542431 + 9440542432.

It is an arithmetic number, because the mean of its divisors is an integer number (9440542432).

Almost surely, 2^18881084863 is an apocalyptic number.

18881084863 is a deficient number, since it is larger than the sum of its proper divisors (1).

18881084863 is an equidigital number, since it uses as much as digits as its factorization.

18881084863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2359296, while the sum is 55.

The spelling of 18881084863 in words is "eighteen billion, eight hundred eighty-one million, eighty-four thousand, eight hundred sixty-three".