20841000577 has 2 divisors, whose sum is σ = 20841000578. Its totient is φ = 20841000576.

The previous prime is 20841000559. The next prime is 20841000581. The reversal of 20841000577 is 77500014802.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18211772401 + 2629228176 = 134951^2 + 51276^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20841000577 is a prime.

It is not a weakly prime, because it can be changed into another prime (20841000547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10420500288 + 10420500289.

It is an arithmetic number, because the mean of its divisors is an integer number (10420500289).

Almost surely, 2^20841000577 is an apocalyptic number.

It is an amenable number.

20841000577 is a deficient number, since it is larger than the sum of its proper divisors (1).

20841000577 is an equidigital number, since it uses as much as digits as its factorization.

20841000577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 34.

The spelling of 20841000577 in words is "twenty billion, eight hundred forty-one million, five hundred seventy-seven", and thus it is an aban number.