20862681193 has 2 divisors, whose sum is σ = 20862681194. Its totient is φ = 20862681192.

The previous prime is 20862681157. The next prime is 20862681199. The reversal of 20862681193 is 39118626802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14526998784 + 6335682409 = 120528^2 + 79597^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20862681193 is a prime.

It is not a weakly prime, because it can be changed into another prime (20862681199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10431340596 + 10431340597.

It is an arithmetic number, because the mean of its divisors is an integer number (10431340597).

Almost surely, 2^20862681193 is an apocalyptic number.

It is an amenable number.

20862681193 is a deficient number, since it is larger than the sum of its proper divisors (1).

20862681193 is an equidigital number, since it uses as much as digits as its factorization.

20862681193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 20862681193 in words is "twenty billion, eight hundred sixty-two million, six hundred eighty-one thousand, one hundred ninety-three".