18845747 has 2 divisors, whose sum is σ = 18845748. Its totient is φ = 18845746.

The previous prime is 18845719. The next prime is 18845789. The reversal of 18845747 is 74754881.

It is a weak prime.

It is an emirp because it is prime and its reverse (74754881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18845747 - 2⁶ = 18845683 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18845698 and 18845707.

It is not a weakly prime, because it can be changed into another prime (18845147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9422873 + 9422874.

It is an arithmetic number, because the mean of its divisors is an integer number (9422874).

Almost surely, 2^18845747 is an apocalyptic number.

18845747 is a deficient number, since it is larger than the sum of its proper divisors (1).

18845747 is an equidigital number, since it uses as much as digits as its factorization.

18845747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 250880, while the sum is 44.

The square root of 18845747 is about 4341.1688518186. The cubic root of 18845747 is about 266.1160808298.

The spelling of 18845747 in words is "eighteen million, eight hundred forty-five thousand, seven hundred forty-seven".