20705105230126 has 12 divisors (see below), whose sum is σ = 32992044839928. Its totient is φ = 9743578931552.

The previous prime is 20705105230099. The next prime is 20705105230181. The reversal of 20705105230126 is 62103250150702.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 20705105230091 and 20705105230100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17910990106 + ... + 17910991261.

It is an arithmetic number, because the mean of its divisors is an integer number (2749337069994).

Almost surely, 2^{20705105230126} is an apocalyptic number.

20705105230126 is a deficient number, since it is larger than the sum of its proper divisors (12286939609802).

20705105230126 is a wasteful number, since it uses less digits than its factorization.

20705105230126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35821981403 (or 35821981386 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

Adding to 20705105230126 its reverse (62103250150702), we get a palindrome (82808355380828).

The spelling of 20705105230126 in words is "twenty trillion, seven hundred five billion, one hundred five million, two hundred thirty thousand, one hundred twenty-six".