20449617 has 8 divisors (see below), whose sum is σ = 27324096. Its totient is φ = 13604112.

The previous prime is 20449613. The next prime is 20449631. The reversal of 20449617 is 71694402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20449617 - 2² = 20449613 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20449613) 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, 5538 + ... + 8459.

It is an arithmetic number, because the mean of its divisors is an integer number (3415512).

Almost surely, 2^20449617 is an apocalyptic number.

It is an amenable number.

20449617 is a deficient number, since it is larger than the sum of its proper divisors (6874479).

20449617 is a wasteful number, since it uses less digits than its factorization.

20449617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14487.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 20449617 is about 4522.1252746911. The cubic root of 20449617 is about 273.4607871128.

The spelling of 20449617 in words is "twenty million, four hundred forty-nine thousand, six hundred seventeen".