19994461 has 2 divisors, whose sum is σ = 19994462. Its totient is φ = 19994460.

The previous prime is 19994449. The next prime is 19994477. The reversal of 19994461 is 16449991.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19971961 + 22500 = 4469^2 + 150^2 .

It is a cyclic number.

It is not a de Polignac number, because 19994461 - 2¹³ = 19986269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19994561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9997230 + 9997231.

It is an arithmetic number, because the mean of its divisors is an integer number (9997231).

Almost surely, 2^19994461 is an apocalyptic number.

It is an amenable number.

19994461 is a deficient number, since it is larger than the sum of its proper divisors (1).

19994461 is an equidigital number, since it uses as much as digits as its factorization.

19994461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 43.

The square root of 19994461 is about 4471.5166330899. The cubic root of 19994461 is about 271.4167007472.

The spelling of 19994461 in words is "nineteen million, nine hundred ninety-four thousand, four hundred sixty-one".