20625057571 has 2 divisors, whose sum is σ = 20625057572. Its totient is φ = 20625057570.

The previous prime is 20625057533. The next prime is 20625057601. The reversal of 20625057571 is 17575052602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20625057571 - 2⁷ = 20625057443 is a prime.

It is a super-3 number, since 3×20625057571³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20625057511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10312528785 + 10312528786.

It is an arithmetic number, because the mean of its divisors is an integer number (10312528786).

Almost surely, 2^20625057571 is an apocalyptic number.

20625057571 is a deficient number, since it is larger than the sum of its proper divisors (1).

20625057571 is an equidigital number, since it uses as much as digits as its factorization.

20625057571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147000, while the sum is 40.

The spelling of 20625057571 in words is "twenty billion, six hundred twenty-five million, fifty-seven thousand, five hundred seventy-one".