18948354443 has 2 divisors, whose sum is σ = 18948354444. Its totient is φ = 18948354442.

The previous prime is 18948354433. The next prime is 18948354463. The reversal of 18948354443 is 34445384981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18948354443 - 2¹² = 18948350347 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (18948354433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9474177221 + 9474177222.

It is an arithmetic number, because the mean of its divisors is an integer number (9474177222).

Almost surely, 2^18948354443 is an apocalyptic number.

18948354443 is a deficient number, since it is larger than the sum of its proper divisors (1).

18948354443 is an equidigital number, since it uses as much as digits as its factorization.

18948354443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6635520, while the sum is 53.

The spelling of 18948354443 in words is "eighteen billion, nine hundred forty-eight million, three hundred fifty-four thousand, four hundred forty-three".