18739114897 has 2 divisors, whose sum is σ = 18739114898.
Its totient is φ = 18739114896.
The previous prime is 18739114843. The next prime is 18739114939. The reversal of 18739114897 is 79841193781.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 14880096256 + 3859018641 = 121984^2 + 62121^2
It is a cyclic number.
It is not a de Polignac number, because 18739114897 - 27 = 18739114769 is a prime.
It is not a weakly prime, because it can be changed into another prime (18739114697) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9369557448 + 9369557449.
It is an arithmetic number, because the mean of its divisors is an integer number (9369557449).
Almost surely, 218739114897 is an apocalyptic number.
It is an amenable number.
18739114897 is a deficient number, since it is larger than the sum of its proper divisors (1).
18739114897 is an equidigital number, since it uses as much as digits as its factorization.
18739114897 is an evil number, because the sum of its binary digits is even.
The product of its digits is 3048192, while the sum is 58.
The spelling of 18739114897 in words is "eighteen billion, seven hundred thirty-nine million, one hundred fourteen thousand, eight hundred ninety-seven".