20713057729 has 16 divisors (see below), whose sum is σ = 25498126080. Its totient is φ = 16385054400.

The previous prime is 20713057709. The next prime is 20713057733. The reversal of 20713057729 is 92775031702.

It is not a de Polignac number, because 20713057729 - 2¹¹ = 20713055681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20713057709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 495804 + ... + 535954.

It is an arithmetic number, because the mean of its divisors is an integer number (1593632880).

Almost surely, 2^20713057729 is an apocalyptic number.

It is an amenable number.

20713057729 is a deficient number, since it is larger than the sum of its proper divisors (4785068351).

20713057729 is a wasteful number, since it uses less digits than its factorization.

20713057729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45840.

The product of its (nonzero) digits is 185220, while the sum is 43.

The spelling of 20713057729 in words is "twenty billion, seven hundred thirteen million, fifty-seven thousand, seven hundred twenty-nine".