20354324550631 has 2 divisors, whose sum is σ = 20354324550632. Its totient is φ = 20354324550630.

The previous prime is 20354324550629. The next prime is 20354324550649. The reversal of 20354324550631 is 13605542345302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20354324550631 - 2¹ = 20354324550629 is a prime.

It is a super-2 number, since 2×20354324550631² (a number of 27 digits) contains 22 as substring.

Together with 20354324550629, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20354324553631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10177162275315 + 10177162275316.

It is an arithmetic number, because the mean of its divisors is an integer number (10177162275316).

Almost surely, 2^{20354324550631} is an apocalyptic number.

20354324550631 is a deficient number, since it is larger than the sum of its proper divisors (1).

20354324550631 is an equidigital number, since it uses as much as digits as its factorization.

20354324550631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296000, while the sum is 43.

Adding to 20354324550631 its reverse (13605542345302), we get a palindrome (33959866895933).

The spelling of 20354324550631 in words is "twenty trillion, three hundred fifty-four billion, three hundred twenty-four million, five hundred fifty thousand, six hundred thirty-one".