20205273129 has 8 divisors (see below), whose sum is σ = 27281381760. Its totient is φ = 13299673296.

The previous prime is 20205273091. The next prime is 20205273133. The reversal of 20205273129 is 92137250202.

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

It is not a de Polignac number, because 20205273129 - 2⁸ = 20205272873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20205273129.

It is not an unprimeable number, because it can be changed into a prime (20205273229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42626922 + ... + 42627395.

It is an arithmetic number, because the mean of its divisors is an integer number (3410172720).

Almost surely, 2^20205273129 is an apocalyptic number.

It is an amenable number.

20205273129 is a deficient number, since it is larger than the sum of its proper divisors (7076108631).

20205273129 is an equidigital number, since it uses as much as digits as its factorization.

20205273129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85254399.

The product of its (nonzero) digits is 15120, while the sum is 33.

The spelling of 20205273129 in words is "twenty billion, two hundred five million, two hundred seventy-three thousand, one hundred twenty-nine".