20852813673577 has 2 divisors, whose sum is σ = 20852813673578. Its totient is φ = 20852813673576.

The previous prime is 20852813673563. The next prime is 20852813673583. The reversal of 20852813673577 is 77537631825802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20098867046976 + 753946626601 = 4483176^2 + 868301^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20852813673577 is a prime.

It is not a weakly prime, because it can be changed into another prime (20852813673077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10426406836788 + 10426406836789.

It is an arithmetic number, because the mean of its divisors is an integer number (10426406836789).

Almost surely, 2^{20852813673577} is an apocalyptic number.

It is an amenable number.

20852813673577 is a deficient number, since it is larger than the sum of its proper divisors (1).

20852813673577 is an equidigital number, since it uses as much as digits as its factorization.

20852813673577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 118540800, while the sum is 64.

The spelling of 20852813673577 in words is "twenty trillion, eight hundred fifty-two billion, eight hundred thirteen million, six hundred seventy-three thousand, five hundred seventy-seven".