20323210381 has 2 divisors, whose sum is σ = 20323210382. Its totient is φ = 20323210380.

The previous prime is 20323210319. The next prime is 20323210403. The reversal of 20323210381 is 18301232302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11436377481 + 8886832900 = 106941^2 + 94270^2 .

It is a cyclic number.

It is not a de Polignac number, because 20323210381 - 2⁹ = 20323209869 is a prime.

It is a super-2 number, since 2×20323210381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20323210081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10161605190 + 10161605191.

It is an arithmetic number, because the mean of its divisors is an integer number (10161605191).

Almost surely, 2^20323210381 is an apocalyptic number.

It is an amenable number.

20323210381 is a deficient number, since it is larger than the sum of its proper divisors (1).

20323210381 is an equidigital number, since it uses as much as digits as its factorization.

20323210381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 20323210381 its reverse (18301232302), we get a palindrome (38624442683).

The spelling of 20323210381 in words is "twenty billion, three hundred twenty-three million, two hundred ten thousand, three hundred eighty-one".