20113249 has 4 divisors (see below), whose sum is σ = 21660436. Its totient is φ = 18566064.

The previous prime is 20113231. The next prime is 20113253. The reversal of 20113249 is 94231102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2347024 + 17766225 = 1532^2 + 4215^2 .

It is a cyclic number.

It is not a de Polignac number, because 20113249 - 2⁵ = 20113217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20113649) 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 3 ways as a sum of consecutive naturals, for example, 773574 + ... + 773599.

It is an arithmetic number, because the mean of its divisors is an integer number (5415109).

Almost surely, 2^20113249 is an apocalyptic number.

It is an amenable number.

20113249 is a deficient number, since it is larger than the sum of its proper divisors (1547187).

20113249 is a wasteful number, since it uses less digits than its factorization.

20113249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547186.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 20113249 is about 4484.7797047347. The cubic root of 20113249 is about 271.9531394547.

The spelling of 20113249 in words is "twenty million, one hundred thirteen thousand, two hundred forty-nine".