18848538851 has 2 divisors, whose sum is σ = 18848538852. Its totient is φ = 18848538850.

The previous prime is 18848538833. The next prime is 18848538937. The reversal of 18848538851 is 15883584881.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18848538851 is a prime.

It is not a weakly prime, because it can be changed into another prime (18848534851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9424269425 + 9424269426.

It is an arithmetic number, because the mean of its divisors is an integer number (9424269426).

Almost surely, 2^18848538851 is an apocalyptic number.

18848538851 is a deficient number, since it is larger than the sum of its proper divisors (1).

18848538851 is an equidigital number, since it uses as much as digits as its factorization.

18848538851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9830400, while the sum is 59.

The spelling of 18848538851 in words is "eighteen billion, eight hundred forty-eight million, five hundred thirty-eight thousand, eight hundred fifty-one".