20774449 has 2 divisors, whose sum is σ = 20774450. Its totient is φ = 20774448.

The previous prime is 20774443. The next prime is 20774471. The reversal of 20774449 is 94447702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17164449 + 3610000 = 4143^2 + 1900^2 .

It is a cyclic number.

It is not a de Polignac number, because 20774449 - 2⁵ = 20774417 is a prime.

It is not a weakly prime, because it can be changed into another prime (20774443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10387224 + 10387225.

It is an arithmetic number, because the mean of its divisors is an integer number (10387225).

Almost surely, 2^20774449 is an apocalyptic number.

It is an amenable number.

20774449 is a deficient number, since it is larger than the sum of its proper divisors (1).

20774449 is an equidigital number, since it uses as much as digits as its factorization.

20774449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 20774449 is about 4557.8996259242. The cubic root of 20774449 is about 274.9011170656.

The spelling of 20774449 in words is "twenty million, seven hundred seventy-four thousand, four hundred forty-nine".