20523232417 has 2 divisors, whose sum is σ = 20523232418. Its totient is φ = 20523232416.

The previous prime is 20523232399. The next prime is 20523232547. The reversal of 20523232417 is 71423232502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14513261841 + 6009970576 = 120471^2 + 77524^2 .

It is a cyclic number.

It is not a de Polignac number, because 20523232417 - 2¹¹ = 20523230369 is a prime.

It is a super-3 number, since 3×20523232417³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20523232217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10261616208 + 10261616209.

It is an arithmetic number, because the mean of its divisors is an integer number (10261616209).

Almost surely, 2^20523232417 is an apocalyptic number.

It is an amenable number.

20523232417 is a deficient number, since it is larger than the sum of its proper divisors (1).

20523232417 is an equidigital number, since it uses as much as digits as its factorization.

20523232417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 31.

Adding to 20523232417 its reverse (71423232502), we get a palindrome (91946464919).

The spelling of 20523232417 in words is "twenty billion, five hundred twenty-three million, two hundred thirty-two thousand, four hundred seventeen".