20535323453 has 2 divisors, whose sum is σ = 20535323454. Its totient is φ = 20535323452.

The previous prime is 20535323441. The next prime is 20535323507. The reversal of 20535323453 is 35432353502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19014479449 + 1520844004 = 137893^2 + 38998^2 .

It is a cyclic number.

It is not a de Polignac number, because 20535323453 - 2²⁸ = 20266887997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20535323353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10267661726 + 10267661727.

It is an arithmetic number, because the mean of its divisors is an integer number (10267661727).

Almost surely, 2^20535323453 is an apocalyptic number.

It is an amenable number.

20535323453 is a deficient number, since it is larger than the sum of its proper divisors (1).

20535323453 is an equidigital number, since it uses as much as digits as its factorization.

20535323453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162000, while the sum is 35.

Adding to 20535323453 its reverse (35432353502), we get a palindrome (55967676955).

The spelling of 20535323453 in words is "twenty billion, five hundred thirty-five million, three hundred twenty-three thousand, four hundred fifty-three".