20850245 has 16 divisors (see below), whose sum is σ = 28531440. Its totient is φ = 14490624.

The previous prime is 20850241. The next prime is 20850251. The reversal of 20850245 is 54205802.

It can be written as a sum of positive squares in 8 ways, for example, as 833569 + 20016676 = 913^2 + 4474^2 .

It is a cyclic number.

It is not a de Polignac number, because 20850245 - 2² = 20850241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20850241) 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, 8330 + ... + 10539.

It is an arithmetic number, because the mean of its divisors is an integer number (1783215).

Almost surely, 2^20850245 is an apocalyptic number.

It is an amenable number.

20850245 is a deficient number, since it is larger than the sum of its proper divisors (7681195).

20850245 is a wasteful number, since it uses less digits than its factorization.

20850245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18904.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 20850245 is about 4566.2068503299. The cubic root of 20850245 is about 275.2350387278.

The spelling of 20850245 in words is "twenty million, eight hundred fifty thousand, two hundred forty-five".