20188324901 has 2 divisors, whose sum is σ = 20188324902. Its totient is φ = 20188324900.

The previous prime is 20188324853. The next prime is 20188324927. The reversal of 20188324901 is 10942388102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11853547876 + 8334777025 = 108874^2 + 91295^2 .

It is a cyclic number.

It is not a de Polignac number, because 20188324901 - 2³⁰ = 19114583077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20188324951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10094162450 + 10094162451.

It is an arithmetic number, because the mean of its divisors is an integer number (10094162451).

Almost surely, 2^20188324901 is an apocalyptic number.

It is an amenable number.

20188324901 is a deficient number, since it is larger than the sum of its proper divisors (1).

20188324901 is an equidigital number, since it uses as much as digits as its factorization.

20188324901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 38.

The spelling of 20188324901 in words is "twenty billion, one hundred eighty-eight million, three hundred twenty-four thousand, nine hundred one".