20430231561953 has 2 divisors, whose sum is σ = 20430231561954. Its totient is φ = 20430231561952.

The previous prime is 20430231561947. The next prime is 20430231561959. The reversal of 20430231561953 is 35916513203402.

It is a balanced prime because it is at equal distance from previous prime (20430231561947) and next prime (20430231561959).

It can be written as a sum of positive squares in only one way, i.e., 10563169510609 + 9867062051344 = 3250103^2 + 3141188^2 .

It is a cyclic number.

It is not a de Polignac number, because 20430231561953 - 2⁸ = 20430231561697 is a prime.

It is not a weakly prime, because it can be changed into another prime (20430231561959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10215115780976 + 10215115780977.

It is an arithmetic number, because the mean of its divisors is an integer number (10215115780977).

Almost surely, 2^{20430231561953} is an apocalyptic number.

It is an amenable number.

20430231561953 is a deficient number, since it is larger than the sum of its proper divisors (1).

20430231561953 is an equidigital number, since it uses as much as digits as its factorization.

20430231561953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 583200, while the sum is 44.

The spelling of 20430231561953 in words is "twenty trillion, four hundred thirty billion, two hundred thirty-one million, five hundred sixty-one thousand, nine hundred fifty-three".