20449015 has 8 divisors (see below), whose sum is σ = 24566688. Its totient is φ = 16340640.

The previous prime is 20448991. The next prime is 20449019. The reversal of 20449015 is 51094402.

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

It is not a de Polignac number, because 20449015 - 2¹⁵ = 20416247 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 (20449019) 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, 4174 + ... + 7636.

It is an arithmetic number, because the mean of its divisors is an integer number (3070836).

Almost surely, 2^20449015 is an apocalyptic number.

20449015 is a deficient number, since it is larger than the sum of its proper divisors (4117673).

20449015 is a wasteful number, since it uses less digits than its factorization.

20449015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4649.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 20449015 is about 4522.0587125777. The cubic root of 20449015 is about 273.4581036883.

The spelling of 20449015 in words is "twenty million, four hundred forty-nine thousand, fifteen".