20512404071 has 2 divisors, whose sum is σ = 20512404072. Its totient is φ = 20512404070.

The previous prime is 20512404053. The next prime is 20512404083. The reversal of 20512404071 is 17040421502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20512404071 - 2⁶ = 20512404007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20512404071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20512404041) 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, 10256202035 + 10256202036.

It is an arithmetic number, because the mean of its divisors is an integer number (10256202036).

Almost surely, 2^20512404071 is an apocalyptic number.

20512404071 is a deficient number, since it is larger than the sum of its proper divisors (1).

20512404071 is an equidigital number, since it uses as much as digits as its factorization.

20512404071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 26.

Adding to 20512404071 its reverse (17040421502), we get a palindrome (37552825573).

The spelling of 20512404071 in words is "twenty billion, five hundred twelve million, four hundred four thousand, seventy-one".