20675112961 has 2 divisors, whose sum is σ = 20675112962. Its totient is φ = 20675112960.

The previous prime is 20675112949. The next prime is 20675112971. The reversal of 20675112961 is 16921157602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14151481600 + 6523631361 = 118960^2 + 80769^2 .

It is a cyclic number.

It is not a de Polignac number, because 20675112961 - 2⁵ = 20675112929 is a prime.

It is a super-3 number, since 3×20675112961³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (20675112911) 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, 10337556480 + 10337556481.

It is an arithmetic number, because the mean of its divisors is an integer number (10337556481).

Almost surely, 2^20675112961 is an apocalyptic number.

It is an amenable number.

20675112961 is a deficient number, since it is larger than the sum of its proper divisors (1).

20675112961 is an equidigital number, since it uses as much as digits as its factorization.

20675112961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 40.

The spelling of 20675112961 in words is "twenty billion, six hundred seventy-five million, one hundred twelve thousand, nine hundred sixty-one".