20134101391 has 2 divisors, whose sum is σ = 20134101392. Its totient is φ = 20134101390.

The previous prime is 20134101389. The next prime is 20134101401. The reversal of 20134101391 is 19310143102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20134101391 - 2¹ = 20134101389 is a prime.

Together with 20134101389, 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 (20134101331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10067050695 + 10067050696.

It is an arithmetic number, because the mean of its divisors is an integer number (10067050696).

Almost surely, 2^20134101391 is an apocalyptic number.

20134101391 is a deficient number, since it is larger than the sum of its proper divisors (1).

20134101391 is an equidigital number, since it uses as much as digits as its factorization.

20134101391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

Adding to 20134101391 its reverse (19310143102), we get a palindrome (39444244493).

The spelling of 20134101391 in words is "twenty billion, one hundred thirty-four million, one hundred one thousand, three hundred ninety-one".