20333025550561 has 2 divisors, whose sum is σ = 20333025550562. Its totient is φ = 20333025550560.

The previous prime is 20333025550501. The next prime is 20333025550577. The reversal of 20333025550561 is 16505552033302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13393726145536 + 6939299405025 = 3659744^2 + 2634255^2 .

It is a cyclic number.

It is not a de Polignac number, because 20333025550561 - 2¹³ = 20333025542369 is a prime.

It is not a weakly prime, because it can be changed into another prime (20333025550501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10166512775280 + 10166512775281.

It is an arithmetic number, because the mean of its divisors is an integer number (10166512775281).

Almost surely, 2^{20333025550561} is an apocalyptic number.

It is an amenable number.

20333025550561 is a deficient number, since it is larger than the sum of its proper divisors (1).

20333025550561 is an equidigital number, since it uses as much as digits as its factorization.

20333025550561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 405000, while the sum is 40.

Adding to 20333025550561 its reverse (16505552033302), we get a palindrome (36838577583863).

The spelling of 20333025550561 in words is "twenty trillion, three hundred thirty-three billion, twenty-five million, five hundred fifty thousand, five hundred sixty-one".