18948354439 has 6 divisors (see below), whose sum is σ = 22041963384. Its totient is φ = 16241446620.

The previous prime is 18948354433. The next prime is 18948354443. The reversal of 18948354439 is 93445384981.

It is not a de Polignac number, because 18948354439 - 2¹⁵ = 18948321671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a 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 in 5 ways as a sum of consecutive naturals, for example, 193350507 + ... + 193350604.

It is an arithmetic number, because the mean of its divisors is an integer number (3673660564).

Almost surely, 2^18948354439 is an apocalyptic number.

18948354439 is a deficient number, since it is larger than the sum of its proper divisors (3093608945).

18948354439 is an equidigital number, since it uses as much as digits as its factorization.

18948354439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386701125 (or 386701118 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 58.

The spelling of 18948354439 in words is "eighteen billion, nine hundred forty-eight million, three hundred fifty-four thousand, four hundred thirty-nine".