20540265611 has 2 divisors, whose sum is σ = 20540265612. Its totient is φ = 20540265610.

The previous prime is 20540265587. The next prime is 20540265619. The reversal of 20540265611 is 11656204502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20540265611 - 2³⁰ = 19466523787 is a prime.

It is a super-2 number, since 2×20540265611² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20540265619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10270132805 + 10270132806.

It is an arithmetic number, because the mean of its divisors is an integer number (10270132806).

Almost surely, 2^20540265611 is an apocalyptic number.

20540265611 is a deficient number, since it is larger than the sum of its proper divisors (1).

20540265611 is an equidigital number, since it uses as much as digits as its factorization.

20540265611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 20540265611 in words is "twenty billion, five hundred forty million, two hundred sixty-five thousand, six hundred eleven".