20105036148251 has 2 divisors, whose sum is σ = 20105036148252. Its totient is φ = 20105036148250.

The previous prime is 20105036148217. The next prime is 20105036148259. The reversal of 20105036148251 is 15284163050102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20105036148251 is a prime.

It is not a weakly prime, because it can be changed into another prime (20105036148259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10052518074125 + 10052518074126.

It is an arithmetic number, because the mean of its divisors is an integer number (10052518074126).

Almost surely, 2^{20105036148251} is an apocalyptic number.

20105036148251 is a deficient number, since it is larger than the sum of its proper divisors (1).

20105036148251 is an equidigital number, since it uses as much as digits as its factorization.

20105036148251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 38.

Adding to 20105036148251 its reverse (15284163050102), we get a palindrome (35389199198353).

The spelling of 20105036148251 in words is "twenty trillion, one hundred five billion, thirty-six million, one hundred forty-eight thousand, two hundred fifty-one".