20331105622493 has 2 divisors, whose sum is σ = 20331105622494. Its totient is φ = 20331105622492.

The previous prime is 20331105622489. The next prime is 20331105622579. The reversal of 20331105622493 is 39422650113302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20328799510009 + 2306112484 = 4508747^2 + 48022^2 .

It is a cyclic number.

It is not a de Polignac number, because 20331105622493 - 2² = 20331105622489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20331105622493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20331105622193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165552811246 + 10165552811247.

It is an arithmetic number, because the mean of its divisors is an integer number (10165552811247).

Almost surely, 2^{20331105622493} is an apocalyptic number.

It is an amenable number.

20331105622493 is a deficient number, since it is larger than the sum of its proper divisors (1).

20331105622493 is an equidigital number, since it uses as much as digits as its factorization.

20331105622493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 41.

Adding to 20331105622493 its reverse (39422650113302), we get a palindrome (59753755735795).

The spelling of 20331105622493 in words is "twenty trillion, three hundred thirty-one billion, one hundred five million, six hundred twenty-two thousand, four hundred ninety-three".