20045543471 has 2 divisors, whose sum is σ = 20045543472. Its totient is φ = 20045543470.

The previous prime is 20045543467. The next prime is 20045543527. The reversal of 20045543471 is 17434554002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20045543471 - 2² = 20045543467 is a prime.

It is a super-3 number, since 3×20045543471³ (a number of 32 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20045543411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10022771735 + 10022771736.

It is an arithmetic number, because the mean of its divisors is an integer number (10022771736).

Almost surely, 2^20045543471 is an apocalyptic number.

20045543471 is a deficient number, since it is larger than the sum of its proper divisors (1).

20045543471 is an equidigital number, since it uses as much as digits as its factorization.

20045543471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67200, while the sum is 35.

The spelling of 20045543471 in words is "twenty billion, forty-five million, five hundred forty-three thousand, four hundred seventy-one".