20003329 has 4 divisors (see below), whose sum is σ = 20190384. Its totient is φ = 19816276.

The previous prime is 20003317. The next prime is 20003369. The reversal of 20003329 is 92330002.

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 20003329 - 2⁵ = 20003297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20003369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93367 + ... + 93580.

It is an arithmetic number, because the mean of its divisors is an integer number (5047596).

Almost surely, 2^20003329 is an apocalyptic number.

It is an amenable number.

20003329 is a deficient number, since it is larger than the sum of its proper divisors (187055).

20003329 is a wasteful number, since it uses less digits than its factorization.

20003329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187054.

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

The square root of 20003329 is about 4472.5081330278. The cubic root of 20003329 is about 271.4568213177.

It can be divided in two parts, 2000 and 3329, that added together give a square (5329 = 73²).

The spelling of 20003329 in words is "twenty million, three thousand, three hundred twenty-nine".