18048379493 has 2 divisors, whose sum is σ = 18048379494. Its totient is φ = 18048379492.

The previous prime is 18048379463. The next prime is 18048379501. The reversal of 18048379493 is 39497384081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13687362049 + 4361017444 = 116993^2 + 66038^2 .

It is an emirp because it is prime and its reverse (39497384081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18048379493 - 2³⁴ = 868510309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18048379423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9024189746 + 9024189747.

It is an arithmetic number, because the mean of its divisors is an integer number (9024189747).

Almost surely, 2^18048379493 is an apocalyptic number.

It is an amenable number.

18048379493 is a deficient number, since it is larger than the sum of its proper divisors (1).

18048379493 is an equidigital number, since it uses as much as digits as its factorization.

18048379493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 18048379493 in words is "eighteen billion, forty-eight million, three hundred seventy-nine thousand, four hundred ninety-three".