20402703572773 has 2 divisors, whose sum is σ = 20402703572774. Its totient is φ = 20402703572772.

The previous prime is 20402703572759. The next prime is 20402703572803. The reversal of 20402703572773 is 37727530720402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18755811316804 + 1646892255969 = 4330798^2 + 1283313^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20402703572773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20402703552773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201351786386 + 10201351786387.

It is an arithmetic number, because the mean of its divisors is an integer number (10201351786387).

Almost surely, 2^{20402703572773} is an apocalyptic number.

It is an amenable number.

20402703572773 is a deficient number, since it is larger than the sum of its proper divisors (1).

20402703572773 is an equidigital number, since it uses as much as digits as its factorization.

20402703572773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3457440, while the sum is 49.

The spelling of 20402703572773 in words is "twenty trillion, four hundred two billion, seven hundred three million, five hundred seventy-two thousand, seven hundred seventy-three".