20225636545321 has 2 divisors, whose sum is σ = 20225636545322. Its totient is φ = 20225636545320.

The previous prime is 20225636545273. The next prime is 20225636545363. The reversal of 20225636545321 is 12354563652202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15506749255321 + 4718887290000 = 3937861^2 + 2172300^2 .

It is a cyclic number.

It is not a de Polignac number, because 20225636545321 - 2⁴³ = 11429543523113 is a prime.

It is a super-3 number, since 3×20225636545321³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20225636545021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10112818272660 + 10112818272661.

It is an arithmetic number, because the mean of its divisors is an integer number (10112818272661).

Almost surely, 2^{20225636545321} is an apocalyptic number.

It is an amenable number.

20225636545321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20225636545321 is an equidigital number, since it uses as much as digits as its factorization.

20225636545321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592000, while the sum is 46.

The spelling of 20225636545321 in words is "twenty trillion, two hundred twenty-five billion, six hundred thirty-six million, five hundred forty-five thousand, three hundred twenty-one".