20542772753 has 2 divisors, whose sum is σ = 20542772754. Its totient is φ = 20542772752.

The previous prime is 20542772693. The next prime is 20542772777. The reversal of 20542772753 is 35727724502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20093629504 + 449143249 = 141752^2 + 21193^2 .

It is a cyclic number.

It is not a de Polignac number, because 20542772753 - 2²⁴ = 20525995537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20542702753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10271386376 + 10271386377.

It is an arithmetic number, because the mean of its divisors is an integer number (10271386377).

Almost surely, 2^20542772753 is an apocalyptic number.

It is an amenable number.

20542772753 is a deficient number, since it is larger than the sum of its proper divisors (1).

20542772753 is an equidigital number, since it uses as much as digits as its factorization.

20542772753 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 823200, while the sum is 44.

The spelling of 20542772753 in words is "twenty billion, five hundred forty-two million, seven hundred seventy-two thousand, seven hundred fifty-three".