18850771 has 2 divisors, whose sum is σ = 18850772. Its totient is φ = 18850770.

The previous prime is 18850729. The next prime is 18850817. The reversal of 18850771 is 17705881.

It is a weak prime.

It is an emirp because it is prime and its reverse (17705881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18850771 - 2⁹ = 18850259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18850771.

It is not a weakly prime, because it can be changed into another prime (18850471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9425385 + 9425386.

It is an arithmetic number, because the mean of its divisors is an integer number (9425386).

Almost surely, 2^18850771 is an apocalyptic number.

18850771 is a deficient number, since it is larger than the sum of its proper divisors (1).

18850771 is an equidigital number, since it uses as much as digits as its factorization.

18850771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15680, while the sum is 37.

The square root of 18850771 is about 4341.7474592611. The cubic root of 18850771 is about 266.1397262780.

The spelling of 18850771 in words is "eighteen million, eight hundred fifty thousand, seven hundred seventy-one".