20297146577 has 2 divisors, whose sum is σ = 20297146578. Its totient is φ = 20297146576.

The previous prime is 20297146531. The next prime is 20297146589. The reversal of 20297146577 is 77564179202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20098449361 + 198697216 = 141769^2 + 14096^2 .

It is a cyclic number.

It is not a de Polignac number, because 20297146577 - 2¹⁶ = 20297081041 is a prime.

It is not a weakly prime, because it can be changed into another prime (20297145577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10148573288 + 10148573289.

It is an arithmetic number, because the mean of its divisors is an integer number (10148573289).

Almost surely, 2^20297146577 is an apocalyptic number.

It is an amenable number.

20297146577 is a deficient number, since it is larger than the sum of its proper divisors (1).

20297146577 is an equidigital number, since it uses as much as digits as its factorization.

20297146577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1481760, while the sum is 50.

The spelling of 20297146577 in words is "twenty billion, two hundred ninety-seven million, one hundred forty-six thousand, five hundred seventy-seven".