20950849 has 2 divisors, whose sum is σ = 20950850. Its totient is φ = 20950848.

The previous prime is 20950837. The next prime is 20950871. The reversal of 20950849 is 94805902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11950849 + 9000000 = 3457^2 + 3000^2 .

It is a cyclic number.

It is not a de Polignac number, because 20950849 - 2⁹ = 20950337 is a prime.

It is not a weakly prime, because it can be changed into another prime (20950049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10475424 + 10475425.

It is an arithmetic number, because the mean of its divisors is an integer number (10475425).

Almost surely, 2^20950849 is an apocalyptic number.

It is an amenable number.

20950849 is a deficient number, since it is larger than the sum of its proper divisors (1).

20950849 is an equidigital number, since it uses as much as digits as its factorization.

20950849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 20950849 is about 4577.2097395684. The cubic root of 20950849 is about 275.6770052339.

The spelling of 20950849 in words is "twenty million, nine hundred fifty thousand, eight hundred forty-nine".