20729311726 has 16 divisors (see below), whose sum is σ = 32930932320. Its totient is φ = 9752627200.

The previous prime is 20729311723. The next prime is 20729311741. The reversal of 20729311726 is 62711392702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20729311723) 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 in 7 ways as a sum of consecutive naturals, for example, 74751 + ... + 216901.

It is an arithmetic number, because the mean of its divisors is an integer number (2058183270).

Almost surely, 2^20729311726 is an apocalyptic number.

20729311726 is a deficient number, since it is larger than the sum of its proper divisors (12201620594).

20729311726 is a wasteful number, since it uses less digits than its factorization.

20729311726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146459.

The product of its (nonzero) digits is 63504, while the sum is 40.

The spelling of 20729311726 in words is "twenty billion, seven hundred twenty-nine million, three hundred eleven thousand, seven hundred twenty-six".