20470109 has 8 divisors (see below), whose sum is σ = 22710240. Its totient is φ = 18293200.

The previous prime is 20470097. The next prime is 20470123. The reversal of 20470109 is 90107402.

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 20470109 - 2¹² = 20466013 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 (20470189) 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, 15122 + ... + 16419.

It is an arithmetic number, because the mean of its divisors is an integer number (2838780).

Almost surely, 2^20470109 is an apocalyptic number.

It is an amenable number.

20470109 is a deficient number, since it is larger than the sum of its proper divisors (2240131).

20470109 is a wasteful number, since it uses less digits than its factorization.

20470109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31611.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 20470109 is about 4524.3904561830. The cubic root of 20470109 is about 273.5520991359.

The spelling of 20470109 in words is "twenty million, four hundred seventy thousand, one hundred nine".