20345324947 has 2 divisors, whose sum is σ = 20345324948. Its totient is φ = 20345324946.

The previous prime is 20345324933. The next prime is 20345325029. The reversal of 20345324947 is 74942354302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20345324947 - 2¹⁹ = 20344800659 is a prime.

It is not a weakly prime, because it can be changed into another prime (20345324927) 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, 10172662473 + 10172662474.

It is an arithmetic number, because the mean of its divisors is an integer number (10172662474).

Almost surely, 2^20345324947 is an apocalyptic number.

20345324947 is a deficient number, since it is larger than the sum of its proper divisors (1).

20345324947 is an equidigital number, since it uses as much as digits as its factorization.

20345324947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 43.

The spelling of 20345324947 in words is "twenty billion, three hundred forty-five million, three hundred twenty-four thousand, nine hundred forty-seven".