20339329 has 4 divisors (see below), whose sum is σ = 21409840. Its totient is φ = 19268820.

The previous prime is 20339323. The next prime is 20339339. The reversal of 20339329 is 92393302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20339329 - 2⁷ = 20339201 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 20339329.

It is not an unprimeable number, because it can be changed into a prime (20339323) 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 3 ways as a sum of consecutive naturals, for example, 535227 + ... + 535264.

It is an arithmetic number, because the mean of its divisors is an integer number (5352460).

Almost surely, 2^20339329 is an apocalyptic number.

It is an amenable number.

20339329 is a deficient number, since it is larger than the sum of its proper divisors (1070511).

20339329 is a wasteful number, since it uses less digits than its factorization.

20339329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070510.

The product of its (nonzero) digits is 8748, while the sum is 31.

The square root of 20339329 is about 4509.9145224716. The cubic root of 20339329 is about 272.9682950116.

The spelling of 20339329 in words is "twenty million, three hundred thirty-nine thousand, three hundred twenty-nine".