20705381744339 has 2 divisors, whose sum is σ = 20705381744340. Its totient is φ = 20705381744338.

The previous prime is 20705381744261. The next prime is 20705381744417. The reversal of 20705381744339 is 93344718350702.

It is a balanced prime because it is at equal distance from previous prime (20705381744261) and next prime (20705381744417).

It is a cyclic number.

It is not a de Polignac number, because 20705381744339 - 2²⁴ = 20705364967123 is a prime.

It is not a weakly prime, because it can be changed into another prime (20705381744239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10352690872169 + 10352690872170.

It is an arithmetic number, because the mean of its divisors is an integer number (10352690872170).

Almost surely, 2^{20705381744339} is an apocalyptic number.

20705381744339 is a deficient number, since it is larger than the sum of its proper divisors (1).

20705381744339 is an equidigital number, since it uses as much as digits as its factorization.

20705381744339 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15240960, while the sum is 56.

The spelling of 20705381744339 in words is "twenty trillion, seven hundred five billion, three hundred eighty-one million, seven hundred forty-four thousand, three hundred thirty-nine".