18956449 has 2 divisors, whose sum is σ = 18956450. Its totient is φ = 18956448.

The previous prime is 18956437. The next prime is 18956461. The reversal of 18956449 is 94465981.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (18956437) and next prime (18956461).

It can be written as a sum of positive squares in only one way, i.e., 11155600 + 7800849 = 3340^2 + 2793^2 .

It is a cyclic number.

It is not a de Polignac number, because 18956449 - 2⁵ = 18956417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18956399 and 18956408.

It is not a weakly prime, because it can be changed into another prime (18956489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9478224 + 9478225.

It is an arithmetic number, because the mean of its divisors is an integer number (9478225).

Almost surely, 2^18956449 is an apocalyptic number.

It is an amenable number.

18956449 is a deficient number, since it is larger than the sum of its proper divisors (1).

18956449 is an equidigital number, since it uses as much as digits as its factorization.

18956449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 46.

The square root of 18956449 is about 4353.9004352419. The cubic root of 18956449 is about 266.6361289683.

The spelling of 18956449 in words is "eighteen million, nine hundred fifty-six thousand, four hundred forty-nine".