20446849 has 2 divisors, whose sum is σ = 20446850. Its totient is φ = 20446848.

The previous prime is 20446847. The next prime is 20446861. The reversal of 20446849 is 94864402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14493249 + 5953600 = 3807^2 + 2440^2 .

It is a cyclic number.

It is not a de Polignac number, because 20446849 - 2¹ = 20446847 is a prime.

Together with 20446847, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20446843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10223424 + 10223425.

It is an arithmetic number, because the mean of its divisors is an integer number (10223425).

Almost surely, 2^20446849 is an apocalyptic number.

It is an amenable number.

20446849 is a deficient number, since it is larger than the sum of its proper divisors (1).

20446849 is an equidigital number, since it uses as much as digits as its factorization.

20446849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 20446849 is about 4521.8192135467. The cubic root of 20446849 is about 273.4484482735.

The spelling of 20446849 in words is "twenty million, four hundred forty-six thousand, eight hundred forty-nine".