20844245 has 16 divisors (see below), whose sum is σ = 26127360. Its totient is φ = 15945600.

The previous prime is 20844223. The next prime is 20844253. The reversal of 20844245 is 54244802.

It is not a de Polignac number, because 20844245 - 2⁶ = 20844181 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13040 + ... + 14550.

It is an arithmetic number, because the mean of its divisors is an integer number (1632960).

Almost surely, 2^20844245 is an apocalyptic number.

It is an amenable number.

20844245 is a deficient number, since it is larger than the sum of its proper divisors (5283115).

20844245 is a wasteful number, since it uses less digits than its factorization.

20844245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636.

The product of its (nonzero) digits is 10240, while the sum is 29.

The square root of 20844245 is about 4565.5498025977. The cubic root of 20844245 is about 275.2086350626.

The spelling of 20844245 in words is "twenty million, eight hundred forty-four thousand, two hundred forty-five".