20107449 has 6 divisors (see below), whose sum is σ = 29044106. Its totient is φ = 13404960.

The previous prime is 20107441. The next prime is 20107457. The reversal of 20107449 is 94470102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20107441) and next prime (20107457).

It can be written as a sum of positive squares in only one way, i.e., 16867449 + 3240000 = 4107^2 + 1800^2 .

It is not a de Polignac number, because 20107449 - 2³ = 20107441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20107441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1117072 + ... + 1117089.

Almost surely, 2^20107449 is an apocalyptic number.

It is an amenable number.

20107449 is a deficient number, since it is larger than the sum of its proper divisors (8936657).

20107449 is a wasteful number, since it uses less digits than its factorization.

20107449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234167 (or 2234164 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 20107449 is about 4484.1330265727. The cubic root of 20107449 is about 271.9269961589.

The spelling of 20107449 in words is "twenty million, one hundred seven thousand, four hundred forty-nine".