20571065528471 has 2 divisors, whose sum is σ = 20571065528472. Its totient is φ = 20571065528470.

The previous prime is 20571065528383. The next prime is 20571065528501. The reversal of 20571065528471 is 17482556017502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20571065528471 is a prime.

It is a super-3 number, since 3×20571065528471³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20571065528071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10285532764235 + 10285532764236.

It is an arithmetic number, because the mean of its divisors is an integer number (10285532764236).

Almost surely, 2^{20571065528471} is an apocalyptic number.

20571065528471 is a deficient number, since it is larger than the sum of its proper divisors (1).

20571065528471 is an equidigital number, since it uses as much as digits as its factorization.

20571065528471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704000, while the sum is 53.

The spelling of 20571065528471 in words is "twenty trillion, five hundred seventy-one billion, sixty-five million, five hundred twenty-eight thousand, four hundred seventy-one".