20404325514523 has 2 divisors, whose sum is σ = 20404325514524. Its totient is φ = 20404325514522.

The previous prime is 20404325514499. The next prime is 20404325514569. The reversal of 20404325514523 is 32541552340402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20404325514523 - 2⁹ = 20404325514011 is a prime.

It is a super-2 number, since 2×20404325514523² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20404325514623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10202162757261 + 10202162757262.

It is an arithmetic number, because the mean of its divisors is an integer number (10202162757262).

Almost surely, 2^{20404325514523} is an apocalyptic number.

20404325514523 is a deficient number, since it is larger than the sum of its proper divisors (1).

20404325514523 is an equidigital number, since it uses as much as digits as its factorization.

20404325514523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576000, while the sum is 40.

Adding to 20404325514523 its reverse (32541552340402), we get a palindrome (52945877854925).

The spelling of 20404325514523 in words is "twenty trillion, four hundred four billion, three hundred twenty-five million, five hundred fourteen thousand, five hundred twenty-three".