20007329 has 8 divisors (see below), whose sum is σ = 20618472. Its totient is φ = 19405440.

The previous prime is 20007319. The next prime is 20007359. The reversal of 20007329 is 92370002.

It can be written as a sum of positive squares in 4 ways, for example, as 4389025 + 15618304 = 2095^2 + 3952^2 .

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 20007329 - 2²⁴ = 3230113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20007319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2207 + ... + 6699.

It is an arithmetic number, because the mean of its divisors is an integer number (2577309).

Almost surely, 2^20007329 is an apocalyptic number.

It is an amenable number.

20007329 is a deficient number, since it is larger than the sum of its proper divisors (611143).

20007329 is an equidigital number, since it uses as much as digits as its factorization.

20007329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4627.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 20007329 is about 4472.9552870558. The cubic root of 20007329 is about 271.4749142214.

The spelling of 20007329 in words is "twenty million, seven thousand, three hundred twenty-nine".