20032309 has 8 divisors (see below), whose sum is σ = 21903840. Its totient is φ = 18169200.

The previous prime is 20032283. The next prime is 20032321. The reversal of 20032309 is 90323002.

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 20032309 - 2¹¹ = 20030261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20032399) 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, 3547 + ... + 7255.

It is an arithmetic number, because the mean of its divisors is an integer number (2737980).

Almost surely, 2^20032309 is an apocalyptic number.

It is an amenable number.

20032309 is a deficient number, since it is larger than the sum of its proper divisors (1871531).

20032309 is a wasteful number, since it uses less digits than its factorization.

20032309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4211.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 20032309 is about 4475.7467533363. The cubic root of 20032309 is about 271.5878498863.

The spelling of 20032309 in words is "twenty million, thirty-two thousand, three hundred nine".