20402426436127 has 2 divisors, whose sum is σ = 20402426436128. Its totient is φ = 20402426436126.

The previous prime is 20402426436107. The next prime is 20402426436187. The reversal of 20402426436127 is 72163462420402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20402426436127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20402426436107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201213218063 + 10201213218064.

It is an arithmetic number, because the mean of its divisors is an integer number (10201213218064).

Almost surely, 2^{20402426436127} is an apocalyptic number.

20402426436127 is a deficient number, since it is larger than the sum of its proper divisors (1).

20402426436127 is an equidigital number, since it uses as much as digits as its factorization.

20402426436127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 774144, while the sum is 43.

Adding to 20402426436127 its reverse (72163462420402), we get a palindrome (92565888856529).

The spelling of 20402426436127 in words is "twenty trillion, four hundred two billion, four hundred twenty-six million, four hundred thirty-six thousand, one hundred twenty-seven".