18709278743 has 2 divisors, whose sum is σ = 18709278744. Its totient is φ = 18709278742.

The previous prime is 18709278691. The next prime is 18709278773. The reversal of 18709278743 is 34787290781.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18709278743 - 2⁸ = 18709278487 is a prime.

It is a super-2 number, since 2×18709278743² (a number of 21 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18709278773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9354639371 + 9354639372.

It is an arithmetic number, because the mean of its divisors is an integer number (9354639372).

Almost surely, 2^18709278743 is an apocalyptic number.

18709278743 is a deficient number, since it is larger than the sum of its proper divisors (1).

18709278743 is an equidigital number, since it uses as much as digits as its factorization.

18709278743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4741632, while the sum is 56.

The spelling of 18709278743 in words is "eighteen billion, seven hundred nine million, two hundred seventy-eight thousand, seven hundred forty-three".