20104144997 has 2 divisors, whose sum is σ = 20104144998. Its totient is φ = 20104144996.

The previous prime is 20104144993. The next prime is 20104145059. The reversal of 20104144997 is 79944140102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19452159841 + 651985156 = 139471^2 + 25534^2 .

It is a cyclic number.

It is not a de Polignac number, because 20104144997 - 2² = 20104144993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20104144993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10052072498 + 10052072499.

It is an arithmetic number, because the mean of its divisors is an integer number (10052072499).

Almost surely, 2^20104144997 is an apocalyptic number.

It is an amenable number.

20104144997 is a deficient number, since it is larger than the sum of its proper divisors (1).

20104144997 is an equidigital number, since it uses as much as digits as its factorization.

20104144997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 20104144997 in words is "twenty billion, one hundred four million, one hundred forty-four thousand, nine hundred ninety-seven".