20405134295683 has 2 divisors, whose sum is σ = 20405134295684. Its totient is φ = 20405134295682.

The previous prime is 20405134295659. The next prime is 20405134295729. The reversal of 20405134295683 is 38659243150402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20405134295683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20405134295683.

It is not a weakly prime, because it can be changed into another prime (20405134295633) 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, 10202567147841 + 10202567147842.

It is an arithmetic number, because the mean of its divisors is an integer number (10202567147842).

Almost surely, 2^{20405134295683} is an apocalyptic number.

20405134295683 is a deficient number, since it is larger than the sum of its proper divisors (1).

20405134295683 is an equidigital number, since it uses as much as digits as its factorization.

20405134295683 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6220800, while the sum is 52.

The spelling of 20405134295683 in words is "twenty trillion, four hundred five billion, one hundred thirty-four million, two hundred ninety-five thousand, six hundred eighty-three".