20342811366866 has 24 divisors (see below), whose sum is σ = 31374788382756. Its totient is φ = 9885190674240.

The previous prime is 20342811366863. The next prime is 20342811366893. The reversal of 20342811366866 is 66866311824302.

It can be written as a sum of positive squares in 6 ways, for example, as 18717122616241 + 1625688750625 = 4326329^2 + 1275025^2 .

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20342811366863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56736836 + ... + 57094256.

Almost surely, 2^{20342811366866} is an apocalyptic number.

20342811366866 is a deficient number, since it is larger than the sum of its proper divisors (11031977015890).

20342811366866 is an frugal number, since it uses more digits than its factorization.

20342811366866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359214 (or 358337 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 56.

The spelling of 20342811366866 in words is "twenty trillion, three hundred forty-two billion, eight hundred eleven million, three hundred sixty-six thousand, eight hundred sixty-six".