20945471753 has 2 divisors, whose sum is σ = 20945471754. Its totient is φ = 20945471752.

The previous prime is 20945471737. The next prime is 20945471777. The reversal of 20945471753 is 35717454902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11064515344 + 9880956409 = 105188^2 + 99403^2 .

It is a cyclic number.

It is not a de Polignac number, because 20945471753 - 2⁴ = 20945471737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20945471698 and 20945471707.

It is not a weakly prime, because it can be changed into another prime (20945471353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10472735876 + 10472735877.

It is an arithmetic number, because the mean of its divisors is an integer number (10472735877).

Almost surely, 2^20945471753 is an apocalyptic number.

It is an amenable number.

20945471753 is a deficient number, since it is larger than the sum of its proper divisors (1).

20945471753 is an equidigital number, since it uses as much as digits as its factorization.

20945471753 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1058400, while the sum is 47.

The spelling of 20945471753 in words is "twenty billion, nine hundred forty-five million, four hundred seventy-one thousand, seven hundred fifty-three".