18794641 has 2 divisors, whose sum is σ = 18794642. Its totient is φ = 18794640.

The previous prime is 18794597. The next prime is 18794647. The reversal of 18794641 is 14649781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9431041 + 9363600 = 3071^2 + 3060^2 .

It is a cyclic number.

It is not a de Polignac number, because 18794641 - 2²¹ = 16697489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18794594 and 18794603.

It is not a weakly prime, because it can be changed into another prime (18794647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9397320 + 9397321.

It is an arithmetic number, because the mean of its divisors is an integer number (9397321).

Almost surely, 2^18794641 is an apocalyptic number.

It is an amenable number.

18794641 is a deficient number, since it is larger than the sum of its proper divisors (1).

18794641 is an equidigital number, since it uses as much as digits as its factorization.

18794641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 18794641 is about 4335.2786530972. The cubic root of 18794641 is about 265.8753113763.

The spelling of 18794641 in words is "eighteen million, seven hundred ninety-four thousand, six hundred forty-one".