20013329 has 4 divisors (see below), whose sum is σ = 22872384. Its totient is φ = 17154276.

The previous prime is 20013319. The next prime is 20013347. The reversal of 20013329 is 92331002.

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 20013329 - 2⁴ = 20013313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20013329.

It is not an unprimeable number, because it can be changed into a prime (20013319) 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, 1429517 + ... + 1429530.

It is an arithmetic number, because the mean of its divisors is an integer number (5718096).

Almost surely, 2^20013329 is an apocalyptic number.

It is an amenable number.

20013329 is a deficient number, since it is larger than the sum of its proper divisors (2859055).

20013329 is an equidigital number, since it uses as much as digits as its factorization.

20013329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2859054.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 20013329 is about 4473.6259342954. The cubic root of 20013329 is about 271.5020490560.

The spelling of 20013329 in words is "twenty million, thirteen thousand, three hundred twenty-nine".