20413205346431 has 2 divisors, whose sum is σ = 20413205346432. Its totient is φ = 20413205346430.

The previous prime is 20413205346419. The next prime is 20413205346463. The reversal of 20413205346431 is 13464350231402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20413205346431 - 2¹⁴ = 20413205330047 is a prime.

It is a super-2 number, since 2×20413205346431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20413205346031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206602673215 + 10206602673216.

It is an arithmetic number, because the mean of its divisors is an integer number (10206602673216).

Almost surely, 2^{20413205346431} is an apocalyptic number.

20413205346431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20413205346431 is an equidigital number, since it uses as much as digits as its factorization.

20413205346431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 38.

Adding to 20413205346431 its reverse (13464350231402), we get a palindrome (33877555577833).

The spelling of 20413205346431 in words is "twenty trillion, four hundred thirteen billion, two hundred five million, three hundred forty-six thousand, four hundred thirty-one".