20056135669 has 2 divisors, whose sum is σ = 20056135670. Its totient is φ = 20056135668.

The previous prime is 20056135663. The next prime is 20056135709. The reversal of 20056135669 is 96653165002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12760413444 + 7295722225 = 112962^2 + 85415^2 .

It is a cyclic number.

It is not a de Polignac number, because 20056135669 - 2¹³ = 20056127477 is a prime.

It is a super-2 number, since 2×20056135669² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20056135663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10028067834 + 10028067835.

It is an arithmetic number, because the mean of its divisors is an integer number (10028067835).

Almost surely, 2^20056135669 is an apocalyptic number.

It is an amenable number.

20056135669 is a deficient number, since it is larger than the sum of its proper divisors (1).

20056135669 is an equidigital number, since it uses as much as digits as its factorization.

20056135669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 43.

The spelling of 20056135669 in words is "twenty billion, fifty-six million, one hundred thirty-five thousand, six hundred sixty-nine".