20852813673077 has 2 divisors, whose sum is σ = 20852813673078. Its totient is φ = 20852813673076.

The previous prime is 20852813673073. The next prime is 20852813673113. The reversal of 20852813673077 is 77037631825802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20825066775601 + 27746897476 = 4563449^2 + 166574^2 .

It is a cyclic number.

It is not a de Polignac number, because 20852813673077 - 2² = 20852813673073 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20852813673073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10426406836538 + 10426406836539.

It is an arithmetic number, because the mean of its divisors is an integer number (10426406836539).

Almost surely, 2^{20852813673077} is an apocalyptic number.

It is an amenable number.

20852813673077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20852813673077 is an equidigital number, since it uses as much as digits as its factorization.

20852813673077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23708160, while the sum is 59.

The spelling of 20852813673077 in words is "twenty trillion, eight hundred fifty-two billion, eight hundred thirteen million, six hundred seventy-three thousand, seventy-seven".