20320329 has 24 divisors (see below), whose sum is σ = 29626560. Its totient is φ = 12372192.

The previous prime is 20320303. The next prime is 20320343. The reversal of 20320329 is 92302302.

It is not a de Polignac number, because 20320329 - 2⁸ = 20320073 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31084 + ... + 31730.

It is an arithmetic number, because the mean of its divisors is an integer number (1234440).

Almost surely, 2^20320329 is an apocalyptic number.

20320329 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20320329 is a deficient number, since it is larger than the sum of its proper divisors (9306231).

20320329 is a wasteful number, since it uses less digits than its factorization.

20320329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717 (or 698 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 20320329 is about 4507.8075602226. The cubic root of 20320329 is about 272.8832706826.

The spelling of 20320329 in words is "twenty million, three hundred twenty thousand, three hundred twenty-nine".