20540434240103 has 2 divisors, whose sum is σ = 20540434240104. Its totient is φ = 20540434240102.

The previous prime is 20540434240069. The next prime is 20540434240129. The reversal of 20540434240103 is 30104243404502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20540434240103 - 2²⁶ = 20540367131239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20540434240103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20540434242103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10270217120051 + 10270217120052.

It is an arithmetic number, because the mean of its divisors is an integer number (10270217120052).

Almost surely, 2^{20540434240103} is an apocalyptic number.

20540434240103 is a deficient number, since it is larger than the sum of its proper divisors (1).

20540434240103 is an equidigital number, since it uses as much as digits as its factorization.

20540434240103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 32.

Adding to 20540434240103 its reverse (30104243404502), we get a palindrome (50644677644605).

The spelling of 20540434240103 in words is "twenty trillion, five hundred forty billion, four hundred thirty-four million, two hundred forty thousand, one hundred three".