20963603077 has 2 divisors, whose sum is σ = 20963603078. Its totient is φ = 20963603076.

The previous prime is 20963603047. The next prime is 20963603119. The reversal of 20963603077 is 77030636902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20827973761 + 135629316 = 144319^2 + 11646^2 .

It is a cyclic number.

It is not a de Polignac number, because 20963603077 - 2³¹ = 18816119429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20963603047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10481801538 + 10481801539.

It is an arithmetic number, because the mean of its divisors is an integer number (10481801539).

Almost surely, 2^20963603077 is an apocalyptic number.

It is an amenable number.

20963603077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20963603077 is an equidigital number, since it uses as much as digits as its factorization.

20963603077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 43.

The spelling of 20963603077 in words is "twenty billion, nine hundred sixty-three million, six hundred three thousand, seventy-seven".