20125574751571 has 2 divisors, whose sum is σ = 20125574751572. Its totient is φ = 20125574751570.

The previous prime is 20125574751539. The next prime is 20125574751589. The reversal of 20125574751571 is 17515747552102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20125574751571 - 2⁵ = 20125574751539 is a prime.

It is not a weakly prime, because it can be changed into another prime (20125574751521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10062787375785 + 10062787375786.

It is an arithmetic number, because the mean of its divisors is an integer number (10062787375786).

Almost surely, 2^{20125574751571} is an apocalyptic number.

20125574751571 is a deficient number, since it is larger than the sum of its proper divisors (1).

20125574751571 is an equidigital number, since it uses as much as digits as its factorization.

20125574751571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3430000, while the sum is 52.

The spelling of 20125574751571 in words is "twenty trillion, one hundred twenty-five billion, five hundred seventy-four million, seven hundred fifty-one thousand, five hundred seventy-one".