20400311167 has 2 divisors, whose sum is σ = 20400311168. Its totient is φ = 20400311166.

The previous prime is 20400311111. The next prime is 20400311177. The reversal of 20400311167 is 76111300402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20400311167 - 2¹⁹ = 20399786879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20400311177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200155583 + 10200155584.

It is an arithmetic number, because the mean of its divisors is an integer number (10200155584).

Almost surely, 2^20400311167 is an apocalyptic number.

20400311167 is a deficient number, since it is larger than the sum of its proper divisors (1).

20400311167 is an equidigital number, since it uses as much as digits as its factorization.

20400311167 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

Adding to 20400311167 its reverse (76111300402), we get a palindrome (96511611569).

The spelling of 20400311167 in words is "twenty billion, four hundred million, three hundred eleven thousand, one hundred sixty-seven".