18801147593 has 2 divisors, whose sum is σ = 18801147594. Its totient is φ = 18801147592.

The previous prime is 18801147571. The next prime is 18801147649. The reversal of 18801147593 is 39574110881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16559314489 + 2241833104 = 128683^2 + 47348^2 .

It is an emirp because it is prime and its reverse (39574110881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18801147593 - 2⁶ = 18801147529 is a prime.

It is not a weakly prime, because it can be changed into another prime (18801147523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9400573796 + 9400573797.

It is an arithmetic number, because the mean of its divisors is an integer number (9400573797).

Almost surely, 2^18801147593 is an apocalyptic number.

It is an amenable number.

18801147593 is a deficient number, since it is larger than the sum of its proper divisors (1).

18801147593 is an equidigital number, since it uses as much as digits as its factorization.

18801147593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 47.

The spelling of 18801147593 in words is "eighteen billion, eight hundred one million, one hundred forty-seven thousand, five hundred ninety-three".