18826641868 has 24 divisors (see below), whose sum is σ = 34327286784. Its totient is φ = 9024522000.

The previous prime is 18826641859. The next prime is 18826641877. The reversal of 18826641868 is 86814662881.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18826641859) and next prime (18826641877).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 696208 + ... + 722743.

It is an arithmetic number, because the mean of its divisors is an integer number (1430303616).

Almost surely, 2^18826641868 is an apocalyptic number.

It is an amenable number.

18826641868 is a deficient number, since it is larger than the sum of its proper divisors (15500644916).

18826641868 is a wasteful number, since it uses less digits than its factorization.

18826641868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419093 (or 1419091 counting only the distinct ones).

The product of its digits is 7077888, while the sum is 58.

The spelling of 18826641868 in words is "eighteen billion, eight hundred twenty-six million, six hundred forty-one thousand, eight hundred sixty-eight".