18722423600897 has 2 divisors, whose sum is σ = 18722423600898. Its totient is φ = 18722423600896.

The previous prime is 18722423600873. The next prime is 18722423600939. The reversal of 18722423600897 is 79800632422781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17343151869121 + 1379271731776 = 4164511^2 + 1174424^2 .

It is a cyclic number.

It is not a de Polignac number, because 18722423600897 - 2¹² = 18722423596801 is a prime.

It is not a weakly prime, because it can be changed into another prime (18722023600897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9361211800448 + 9361211800449.

It is an arithmetic number, because the mean of its divisors is an integer number (9361211800449).

Almost surely, 2^{18722423600897} is an apocalyptic number.

It is an amenable number.

18722423600897 is a deficient number, since it is larger than the sum of its proper divisors (1).

18722423600897 is an equidigital number, since it uses as much as digits as its factorization.

18722423600897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16257024, while the sum is 59.

The spelling of 18722423600897 in words is "eighteen trillion, seven hundred twenty-two billion, four hundred twenty-three million, six hundred thousand, eight hundred ninety-seven".