20312321371 has 2 divisors, whose sum is σ = 20312321372. Its totient is φ = 20312321370.

The previous prime is 20312321287. The next prime is 20312321377. The reversal of 20312321371 is 17312321302.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20312321371 - 2⁹ = 20312320859 is a prime.

It is not a weakly prime, because it can be changed into another prime (20312321377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156160685 + 10156160686.

It is an arithmetic number, because the mean of its divisors is an integer number (10156160686).

Almost surely, 2^20312321371 is an apocalyptic number.

20312321371 is a deficient number, since it is larger than the sum of its proper divisors (1).

20312321371 is an equidigital number, since it uses as much as digits as its factorization.

20312321371 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

Adding to 20312321371 its reverse (17312321302), we get a palindrome (37624642673).

The spelling of 20312321371 in words is "twenty billion, three hundred twelve million, three hundred twenty-one thousand, three hundred seventy-one".