20310071729 has 8 divisors (see below), whose sum is σ = 21030672000. Its totient is φ = 19590821712.

The previous prime is 20310071713. The next prime is 20310071791. The reversal of 20310071729 is 92717001302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20310071729 - 2⁴ = 20310071713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20310071695 and 20310071704.

It is not an unprimeable number, because it can be changed into a prime (20310071629) 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, 306899 + ... + 367160.

It is an arithmetic number, because the mean of its divisors is an integer number (2628834000).

Almost surely, 2^20310071729 is an apocalyptic number.

20310071729 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20310071729 is a deficient number, since it is larger than the sum of its proper divisors (720600271).

20310071729 is a wasteful number, since it uses less digits than its factorization.

20310071729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675127.

The product of its (nonzero) digits is 5292, while the sum is 32.

The spelling of 20310071729 in words is "twenty billion, three hundred ten million, seventy-one thousand, seven hundred twenty-nine".