20540012653 has 2 divisors, whose sum is σ = 20540012654. Its totient is φ = 20540012652.

The previous prime is 20540012617. The next prime is 20540012741. The reversal of 20540012653 is 35621004502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14518563049 + 6021449604 = 120493^2 + 77598^2 .

It is a cyclic number.

It is not a de Polignac number, because 20540012653 - 2³³ = 11950078061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20540013653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10270006326 + 10270006327.

It is an arithmetic number, because the mean of its divisors is an integer number (10270006327).

Almost surely, 2^20540012653 is an apocalyptic number.

It is an amenable number.

20540012653 is a deficient number, since it is larger than the sum of its proper divisors (1).

20540012653 is an equidigital number, since it uses as much as digits as its factorization.

20540012653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 20540012653 in words is "twenty billion, five hundred forty million, twelve thousand, six hundred fifty-three".