18923441 has 2 divisors, whose sum is σ = 18923442. Its totient is φ = 18923440.

The previous prime is 18923407. The next prime is 18923453. The reversal of 18923441 is 14432981.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16777216 + 2146225 = 4096^2 + 1465^2 .

It is a cyclic number.

It is not a de Polignac number, because 18923441 - 2¹⁰ = 18922417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18923398 and 18923407.

It is not a weakly prime, because it can be changed into another prime (18926441) 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, 9461720 + 9461721.

It is an arithmetic number, because the mean of its divisors is an integer number (9461721).

Almost surely, 2^18923441 is an apocalyptic number.

It is an amenable number.

18923441 is a deficient number, since it is larger than the sum of its proper divisors (1).

18923441 is an equidigital number, since it uses as much as digits as its factorization.

18923441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 32.

The square root of 18923441 is about 4350.1081595749. The cubic root of 18923441 is about 266.4812786124.

The spelling of 18923441 in words is "eighteen million, nine hundred twenty-three thousand, four hundred forty-one".