18826641859 has 2 divisors, whose sum is σ = 18826641860. Its totient is φ = 18826641858.

The previous prime is 18826641833. The next prime is 18826641877. The reversal of 18826641859 is 95814662881.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18826641859 - 2¹⁵ = 18826609091 is a prime.

It is not a weakly prime, because it can be changed into another prime (18826641829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9413320929 + 9413320930.

It is an arithmetic number, because the mean of its divisors is an integer number (9413320930).

Almost surely, 2^18826641859 is an apocalyptic number.

18826641859 is a deficient number, since it is larger than the sum of its proper divisors (1).

18826641859 is an equidigital number, since it uses as much as digits as its factorization.

18826641859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6635520, while the sum is 58.

The spelling of 18826641859 in words is "eighteen billion, eight hundred twenty-six million, six hundred forty-one thousand, eight hundred fifty-nine".