20001343381 has 2 divisors, whose sum is σ = 20001343382. Its totient is φ = 20001343380.

The previous prime is 20001343379. The next prime is 20001343519. The reversal of 20001343381 is 18334310002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18060940881 + 1940402500 = 134391^2 + 44050^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001343381 - 2¹ = 20001343379 is a prime.

It is a super-2 number, since 2×20001343381² (a number of 21 digits) contains 22 as substring.

Together with 20001343379, 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 (20001343781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000671690 + 10000671691.

It is an arithmetic number, because the mean of its divisors is an integer number (10000671691).

Almost surely, 2^20001343381 is an apocalyptic number.

It is an amenable number.

20001343381 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001343381 is an equidigital number, since it uses as much as digits as its factorization.

20001343381 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 20001343381 its reverse (18334310002), we get a palindrome (38335653383).

The spelling of 20001343381 in words is "twenty billion, one million, three hundred forty-three thousand, three hundred eighty-one".