20315305425533 has 2 divisors, whose sum is σ = 20315305425534. Its totient is φ = 20315305425532.

The previous prime is 20315305425419. The next prime is 20315305425539. The reversal of 20315305425533 is 33552450351302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10625794036729 + 9689511388804 = 3259723^2 + 3112798^2 .

It is a cyclic number.

It is not a de Polignac number, because 20315305425533 - 2²⁶ = 20315238316669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20315305425539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10157652712766 + 10157652712767.

It is an arithmetic number, because the mean of its divisors is an integer number (10157652712767).

Almost surely, 2^{20315305425533} is an apocalyptic number.

It is an amenable number.

20315305425533 is a deficient number, since it is larger than the sum of its proper divisors (1).

20315305425533 is an equidigital number, since it uses as much as digits as its factorization.

20315305425533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810000, while the sum is 41.

Adding to 20315305425533 its reverse (33552450351302), we get a palindrome (53867755776835).

The spelling of 20315305425533 in words is "twenty trillion, three hundred fifteen billion, three hundred five million, four hundred twenty-five thousand, five hundred thirty-three".