18348801954439 has 12 divisors (see below), whose sum is σ = 20285098901928. Its totient is φ = 16584308631440.

The previous prime is 18348801954389. The next prime is 18348801954473. The reversal of 18348801954439 is 93445910884381.

It is not a de Polignac number, because 18348801954439 - 2³³ = 18340212019847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18348801954499) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 438253609 + ... + 438295474.

It is an arithmetic number, because the mean of its divisors is an integer number (1690424908494).

Almost surely, 2^{18348801954439} is an apocalyptic number.

18348801954439 is a deficient number, since it is larger than the sum of its proper divisors (1936296947489).

18348801954439 is a wasteful number, since it uses less digits than its factorization.

18348801954439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876549278 (or 876549267 counting only the distinct ones).

The product of its (nonzero) digits is 119439360, while the sum is 67.

The spelling of 18348801954439 in words is "eighteen trillion, three hundred forty-eight billion, eight hundred one million, nine hundred fifty-four thousand, four hundred thirty-nine".