20474449 has 2 divisors, whose sum is σ = 20474450. Its totient is φ = 20474448.

The previous prime is 20474429. The next prime is 20474453. The reversal of 20474449 is 94447402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12673600 + 7800849 = 3560^2 + 2793^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20474449 is a prime.

It is not a weakly prime, because it can be changed into another prime (20474429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10237224 + 10237225.

It is an arithmetic number, because the mean of its divisors is an integer number (10237225).

Almost surely, 2^20474449 is an apocalyptic number.

It is an amenable number.

20474449 is a deficient number, since it is larger than the sum of its proper divisors (1).

20474449 is an equidigital number, since it uses as much as digits as its factorization.

20474449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 20474449 is about 4524.8700533827. The cubic root of 20474449 is about 273.5714302855.

The spelling of 20474449 in words is "twenty million, four hundred seventy-four thousand, four hundred forty-nine".