18344888747 has 2 divisors, whose sum is σ = 18344888748. Its totient is φ = 18344888746.

The previous prime is 18344888743. The next prime is 18344888753. The reversal of 18344888747 is 74788844381.

It is a weak prime.

It is an emirp because it is prime and its reverse (74788844381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18344888747 - 2² = 18344888743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18344888747.

It is not a weakly prime, because it can be changed into another prime (18344888743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9172444373 + 9172444374.

It is an arithmetic number, because the mean of its divisors is an integer number (9172444374).

Almost surely, 2^18344888747 is an apocalyptic number.

18344888747 is a deficient number, since it is larger than the sum of its proper divisors (1).

18344888747 is an equidigital number, since it uses as much as digits as its factorization.

18344888747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38535168, while the sum is 62.

The spelling of 18344888747 in words is "eighteen billion, three hundred forty-four million, eight hundred eighty-eight thousand, seven hundred forty-seven".