20340133391 has 2 divisors, whose sum is σ = 20340133392. Its totient is φ = 20340133390.

The previous prime is 20340133379. The next prime is 20340133417. The reversal of 20340133391 is 19333104302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20340133391 - 2³⁴ = 3160264207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20340103391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10170066695 + 10170066696.

It is an arithmetic number, because the mean of its divisors is an integer number (10170066696).

Almost surely, 2^20340133391 is an apocalyptic number.

20340133391 is a deficient number, since it is larger than the sum of its proper divisors (1).

20340133391 is an equidigital number, since it uses as much as digits as its factorization.

20340133391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 29.

Adding to 20340133391 its reverse (19333104302), we get a palindrome (39673237693).

The spelling of 20340133391 in words is "twenty billion, three hundred forty million, one hundred thirty-three thousand, three hundred ninety-one".