20500023246401 has 2 divisors, whose sum is σ = 20500023246402. Its totient is φ = 20500023246400.

The previous prime is 20500023246361. The next prime is 20500023246463. The reversal of 20500023246401 is 10464232000502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19457273881600 + 1042749364801 = 4411040^2 + 1021151^2 .

It is a cyclic number.

It is not a de Polignac number, because 20500023246401 - 2¹⁴ = 20500023230017 is a prime.

It is not a weakly prime, because it can be changed into another prime (20500023246491) 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, 10250011623200 + 10250011623201.

It is an arithmetic number, because the mean of its divisors is an integer number (10250011623201).

Almost surely, 2^{20500023246401} is an apocalyptic number.

It is an amenable number.

20500023246401 is a deficient number, since it is larger than the sum of its proper divisors (1).

20500023246401 is an equidigital number, since it uses as much as digits as its factorization.

20500023246401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 20500023246401 its reverse (10464232000502), we get a palindrome (30964255246903).

The spelling of 20500023246401 in words is "twenty trillion, five hundred billion, twenty-three million, two hundred forty-six thousand, four hundred one".