20344245 has 16 divisors (see below), whose sum is σ = 32736960. Its totient is φ = 10788224.

The previous prime is 20344211. The next prime is 20344249. The reversal of 20344245 is 54244302.

It is a cyclic number.

It is not a de Polignac number, because 20344245 - 2¹⁴ = 20327861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20344249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1104 + ... + 6473.

It is an arithmetic number, because the mean of its divisors is an integer number (2046060).

Almost surely, 2^20344245 is an apocalyptic number.

It is an amenable number.

20344245 is a deficient number, since it is larger than the sum of its proper divisors (12392715).

20344245 is a wasteful number, since it uses less digits than its factorization.

20344245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7764.

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 20344245 is about 4510.4595109589. The cubic root of 20344245 is about 272.9902853149.

Adding to 20344245 its reverse (54244302), we get a palindrome (74588547).

The spelling of 20344245 in words is "twenty million, three hundred forty-four thousand, two hundred forty-five".