20635565683 has 12 divisors (see below), whose sum is σ = 21145507992. Its totient is φ = 20137559840.

The previous prime is 20635565653. The next prime is 20635565761. The reversal of 20635565683 is 38656553602.

It is not a de Polignac number, because 20635565683 - 2²⁵ = 20602011251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20635565603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 753063 + ... + 779983.

It is an arithmetic number, because the mean of its divisors is an integer number (1762125666).

Almost surely, 2^20635565683 is an apocalyptic number.

20635565683 is a deficient number, since it is larger than the sum of its proper divisors (509942309).

20635565683 is an equidigital number, since it uses as much as digits as its factorization.

20635565683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27362 (or 27315 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 49.

The spelling of 20635565683 in words is "twenty billion, six hundred thirty-five million, five hundred sixty-five thousand, six hundred eighty-three".