20210849 has 2 divisors, whose sum is σ = 20210850. Its totient is φ = 20210848.

The previous prime is 20210831. The next prime is 20210867. The reversal of 20210849 is 94801202.

It is a balanced prime because it is at equal distance from previous prime (20210831) and next prime (20210867).

It can be written as a sum of positive squares in only one way, i.e., 12730624 + 7480225 = 3568^2 + 2735^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210849 - 2¹⁶ = 20145313 is a prime.

It is a Chen prime.

It is equal to p_1283147 and since 20210849 and 1283147 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (20210899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105424 + 10105425.

It is an arithmetic number, because the mean of its divisors is an integer number (10105425).

Almost surely, 2^20210849 is an apocalyptic number.

It is an amenable number.

20210849 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210849 is an equidigital number, since it uses as much as digits as its factorization.

20210849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 20210849 is about 4495.6477842464. The cubic root of 20210849 is about 272.3923161200.

The spelling of 20210849 in words is "twenty million, two hundred ten thousand, eight hundred forty-nine".