20829205 has 8 divisors (see below), whose sum is σ = 25039872. Its totient is φ = 16633488.

The previous prime is 20829181. The next prime is 20829209. The reversal of 20829205 is 50292802.

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 20829205 - 2¹³ = 20821013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20829209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397 + ... + 6466.

It is an arithmetic number, because the mean of its divisors is an integer number (3129984).

Almost surely, 2^20829205 is an apocalyptic number.

It is an amenable number.

20829205 is a deficient number, since it is larger than the sum of its proper divisors (4210667).

20829205 is an equidigital number, since it uses as much as digits as its factorization.

20829205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7475.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 20829205 is about 4563.9023872121. The cubic root of 20829205 is about 275.1424275988.

The spelling of 20829205 in words is "twenty million, eight hundred twenty-nine thousand, two hundred five".