18828841 has 2 divisors, whose sum is σ = 18828842. Its totient is φ = 18828840.

The previous prime is 18828827. The next prime is 18828863. The reversal of 18828841 is 14882881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14402025 + 4426816 = 3795^2 + 2104^2 .

It is a cyclic number.

It is not a de Polignac number, because 18828841 - 2⁷ = 18828713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18828794 and 18828803.

It is not a weakly prime, because it can be changed into another prime (18828941) 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, 9414420 + 9414421.

It is an arithmetic number, because the mean of its divisors is an integer number (9414421).

Almost surely, 2^18828841 is an apocalyptic number.

It is an amenable number.

18828841 is a deficient number, since it is larger than the sum of its proper divisors (1).

18828841 is an equidigital number, since it uses as much as digits as its factorization.

18828841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32768, while the sum is 40.

The square root of 18828841 is about 4339.2212434952. The cubic root of 18828841 is about 266.0364818902.

The spelling of 18828841 in words is "eighteen million, eight hundred twenty-eight thousand, eight hundred forty-one".