20340431411 has 2 divisors, whose sum is σ = 20340431412. Its totient is φ = 20340431410.

The previous prime is 20340431401. The next prime is 20340431429. The reversal of 20340431411 is 11413404302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20340431411 is a prime.

It is not a weakly prime, because it can be changed into another prime (20340431401) 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, 10170215705 + 10170215706.

It is an arithmetic number, because the mean of its divisors is an integer number (10170215706).

Almost surely, 2^20340431411 is an apocalyptic number.

20340431411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20340431411 is an equidigital number, since it uses as much as digits as its factorization.

20340431411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 20340431411 its reverse (11413404302), we get a palindrome (31753835713).

The spelling of 20340431411 in words is "twenty billion, three hundred forty million, four hundred thirty-one thousand, four hundred eleven".