19946449 has 2 divisors, whose sum is σ = 19946450. Its totient is φ = 19946448.

The previous prime is 19946429. The next prime is 19946467. The reversal of 19946449 is 94464991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17073424 + 2873025 = 4132^2 + 1695^2 .

It is an emirp because it is prime and its reverse (94464991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19946449 - 2⁵ = 19946417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19946399 and 19946408.

It is not a weakly prime, because it can be changed into another prime (19946419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9973224 + 9973225.

It is an arithmetic number, because the mean of its divisors is an integer number (9973225).

Almost surely, 2^19946449 is an apocalyptic number.

It is an amenable number.

19946449 is a deficient number, since it is larger than the sum of its proper divisors (1).

19946449 is an equidigital number, since it uses as much as digits as its factorization.

19946449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 46.

The square root of 19946449 is about 4466.1447580660. The cubic root of 19946449 is about 271.1992788143.

The spelling of 19946449 in words is "nineteen million, nine hundred forty-six thousand, four hundred forty-nine".