20303129 has 8 divisors (see below), whose sum is σ = 25313088. Its totient is φ = 15820560.

The previous prime is 20303123. The next prime is 20303137. The reversal of 20303129 is 92130302.

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

It is not a de Polignac number, because 20303129 - 2¹⁶ = 20237593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20303129.

It is not an unprimeable number, because it can be changed into a prime (20303123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131762 + ... + 131915.

It is an arithmetic number, because the mean of its divisors is an integer number (3164136).

Almost surely, 2^20303129 is an apocalyptic number.

It is an amenable number.

20303129 is a deficient number, since it is larger than the sum of its proper divisors (5009959).

20303129 is a wasteful number, since it uses less digits than its factorization.

20303129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263695.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 20303129 is about 4505.8993552897. The cubic root of 20303129 is about 272.8062555719.

The spelling of 20303129 in words is "twenty million, three hundred three thousand, one hundred twenty-nine".