20413449 has 36 divisors (see below), whose sum is σ = 35167860. Its totient is φ = 11370240.

The previous prime is 20413441. The next prime is 20413451. The reversal of 20413449 is 94431402.

20413449 is a `hidden beast` number, since 204 + 13 + 449 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1334025 + 19079424 = 1155^2 + 4368^2 .

It is not a de Polignac number, because 20413449 - 2³ = 20413441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20413441) 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 35 ways as a sum of consecutive naturals, for example, 17517 + ... + 18645.

It is an arithmetic number, because the mean of its divisors is an integer number (976885).

Almost surely, 2^20413449 is an apocalyptic number.

It is an amenable number.

20413449 is a deficient number, since it is larger than the sum of its proper divisors (14754411).

20413449 is a wasteful number, since it uses less digits than its factorization.

20413449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190 (or 1180 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 20413449 is about 4518.1245002766. The cubic root of 20413449 is about 273.2994741256.

The spelling of 20413449 in words is "twenty million, four hundred thirteen thousand, four hundred forty-nine".