20129682729 has 16 divisors (see below), whose sum is σ = 28914080832. Its totient is φ = 12383245248.

The previous prime is 20129682721. The next prime is 20129682737. The reversal of 20129682729 is 92728692102.

It is an interprime number because it is at equal distance from previous prime (20129682721) and next prime (20129682737).

It is not a de Polignac number, because 20129682729 - 2³ = 20129682721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20129682721) 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, 28459 + ... + 202655.

It is an arithmetic number, because the mean of its divisors is an integer number (1807130052).

Almost surely, 2^20129682729 is an apocalyptic number.

It is an amenable number.

20129682729 is a deficient number, since it is larger than the sum of its proper divisors (8784398103).

20129682729 is a wasteful number, since it uses less digits than its factorization.

20129682729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177176.

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 20129682729 in words is "twenty billion, one hundred twenty-nine million, six hundred eighty-two thousand, seven hundred twenty-nine".