20030034391 has 2 divisors, whose sum is σ = 20030034392. Its totient is φ = 20030034390.

The previous prime is 20030034383. The next prime is 20030034407. The reversal of 20030034391 is 19343003002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20030034391 - 2³ = 20030034383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20030032391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10015017195 + 10015017196.

It is an arithmetic number, because the mean of its divisors is an integer number (10015017196).

Almost surely, 2^20030034391 is an apocalyptic number.

20030034391 is a deficient number, since it is larger than the sum of its proper divisors (1).

20030034391 is an equidigital number, since it uses as much as digits as its factorization.

20030034391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 20030034391 its reverse (19343003002), we get a palindrome (39373037393).

The spelling of 20030034391 in words is "twenty billion, thirty million, thirty-four thousand, three hundred ninety-one".