18445167901 has 2 divisors, whose sum is σ = 18445167902. Its totient is φ = 18445167900.

The previous prime is 18445167889. The next prime is 18445167913. The reversal of 18445167901 is 10976154481.

It is a balanced prime because it is at equal distance from previous prime (18445167889) and next prime (18445167913).

It can be written as a sum of positive squares in only one way, i.e., 18444356100 + 811801 = 135810^2 + 901^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18445167901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18445167941) 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, 9222583950 + 9222583951.

It is an arithmetic number, because the mean of its divisors is an integer number (9222583951).

Almost surely, 2^18445167901 is an apocalyptic number.

It is an amenable number.

18445167901 is a deficient number, since it is larger than the sum of its proper divisors (1).

18445167901 is an equidigital number, since it uses as much as digits as its factorization.

18445167901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 18445167901 in words is "eighteen billion, four hundred forty-five million, one hundred sixty-seven thousand, nine hundred one".