18875641 has 2 divisors, whose sum is σ = 18875642. Its totient is φ = 18875640.

The previous prime is 18875609. The next prime is 18875651. The reversal of 18875641 is 14657881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18490000 + 385641 = 4300^2 + 621^2 .

It is a cyclic number.

It is not a de Polignac number, because 18875641 - 2⁵ = 18875609 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18875594 and 18875603.

It is not a weakly prime, because it can be changed into another prime (18875651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9437820 + 9437821.

It is an arithmetic number, because the mean of its divisors is an integer number (9437821).

Almost surely, 2^18875641 is an apocalyptic number.

It is an amenable number.

18875641 is a deficient number, since it is larger than the sum of its proper divisors (1).

18875641 is an equidigital number, since it uses as much as digits as its factorization.

18875641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 40.

The square root of 18875641 is about 4344.6105694297. The cubic root of 18875641 is about 266.2567150620.

The spelling of 18875641 in words is "eighteen million, eight hundred seventy-five thousand, six hundred forty-one".