20431430355053 has 2 divisors, whose sum is σ = 20431430355054. Its totient is φ = 20431430355052.

The previous prime is 20431430355023. The next prime is 20431430355109. The reversal of 20431430355053 is 35055303413402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12273797546404 + 8157632808649 = 3503398^2 + 2856157^2 .

It is a cyclic number.

It is not a de Polignac number, because 20431430355053 - 2⁶ = 20431430354989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20431430354998 and 20431430355016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20431430355023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10215715177526 + 10215715177527.

It is an arithmetic number, because the mean of its divisors is an integer number (10215715177527).

Almost surely, 2^{20431430355053} is an apocalyptic number.

It is an amenable number.

20431430355053 is a deficient number, since it is larger than the sum of its proper divisors (1).

20431430355053 is an equidigital number, since it uses as much as digits as its factorization.

20431430355053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324000, while the sum is 38.

Adding to 20431430355053 its reverse (35055303413402), we get a palindrome (55486733768455).

The spelling of 20431430355053 in words is "twenty trillion, four hundred thirty-one billion, four hundred thirty million, three hundred fifty-five thousand, fifty-three".