20431155359 has 2 divisors, whose sum is σ = 20431155360. Its totient is φ = 20431155358.

The previous prime is 20431155289. The next prime is 20431155361. The reversal of 20431155359 is 95355113402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20431155359 - 2¹² = 20431151263 is a prime.

Together with 20431155361, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20431155959) 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, 10215577679 + 10215577680.

It is an arithmetic number, because the mean of its divisors is an integer number (10215577680).

Almost surely, 2^20431155359 is an apocalyptic number.

20431155359 is a deficient number, since it is larger than the sum of its proper divisors (1).

20431155359 is an equidigital number, since it uses as much as digits as its factorization.

20431155359 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 38.

The spelling of 20431155359 in words is "twenty billion, four hundred thirty-one million, one hundred fifty-five thousand, three hundred fifty-nine".