20268684773 has 2 divisors, whose sum is σ = 20268684774. Its totient is φ = 20268684772.

The previous prime is 20268684769. The next prime is 20268684817. The reversal of 20268684773 is 37748686202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15559568644 + 4709116129 = 124738^2 + 68623^2 .

It is a cyclic number.

It is not a de Polignac number, because 20268684773 - 2² = 20268684769 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20268684763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10134342386 + 10134342387.

It is an arithmetic number, because the mean of its divisors is an integer number (10134342387).

Almost surely, 2^20268684773 is an apocalyptic number.

It is an amenable number.

20268684773 is a deficient number, since it is larger than the sum of its proper divisors (1).

20268684773 is an equidigital number, since it uses as much as digits as its factorization.

20268684773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5419008, while the sum is 53.

The spelling of 20268684773 in words is "twenty billion, two hundred sixty-eight million, six hundred eighty-four thousand, seven hundred seventy-three".