20249359 has 8 divisors (see below), whose sum is σ = 22084160. Its totient is φ = 18454176.

The previous prime is 20249357. The next prime is 20249387. The reversal of 20249359 is 95394202.

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

It is not a de Polignac number, because 20249359 - 2¹ = 20249357 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 (20249353) 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, 8832 + ... + 10885.

It is an arithmetic number, because the mean of its divisors is an integer number (2760520).

Almost surely, 2^20249359 is an apocalyptic number.

20249359 is a deficient number, since it is larger than the sum of its proper divisors (1834801).

20249359 is a wasteful number, since it uses less digits than its factorization.

20249359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19809.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 20249359 is about 4499.9287772141. The cubic root of 20249359 is about 272.5652129085.

The spelling of 20249359 in words is "twenty million, two hundred forty-nine thousand, three hundred fifty-nine".