20540364236251 has 2 divisors, whose sum is σ = 20540364236252. Its totient is φ = 20540364236250.

The previous prime is 20540364236239. The next prime is 20540364236263. The reversal of 20540364236251 is 15263246304502.

It is a balanced prime because it is at equal distance from previous prime (20540364236239) and next prime (20540364236263).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20540364236251 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20540364236198 and 20540364236207.

It is not a weakly prime, because it can be changed into another prime (20540364234251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10270182118125 + 10270182118126.

It is an arithmetic number, because the mean of its divisors is an integer number (10270182118126).

Almost surely, 2^{20540364236251} is an apocalyptic number.

20540364236251 is a deficient number, since it is larger than the sum of its proper divisors (1).

20540364236251 is an equidigital number, since it uses as much as digits as its factorization.

20540364236251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 43.

The spelling of 20540364236251 in words is "twenty trillion, five hundred forty billion, three hundred sixty-four million, two hundred thirty-six thousand, two hundred fifty-one".