20485575233 has 2 divisors, whose sum is σ = 20485575234. Its totient is φ = 20485575232.

The previous prime is 20485575199. The next prime is 20485575239. The reversal of 20485575233 is 33257558402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14479790224 + 6005785009 = 120332^2 + 77497^2 .

It is a cyclic number.

It is not a de Polignac number, because 20485575233 - 2⁶ = 20485575169 is a prime.

It is not a weakly prime, because it can be changed into another prime (20485575239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10242787616 + 10242787617.

It is an arithmetic number, because the mean of its divisors is an integer number (10242787617).

Almost surely, 2^20485575233 is an apocalyptic number.

It is an amenable number.

20485575233 is a deficient number, since it is larger than the sum of its proper divisors (1).

20485575233 is an equidigital number, since it uses as much as digits as its factorization.

20485575233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008000, while the sum is 44.

The spelling of 20485575233 in words is "twenty billion, four hundred eighty-five million, five hundred seventy-five thousand, two hundred thirty-three".