18283861 has 2 divisors, whose sum is σ = 18283862. Its totient is φ = 18283860.

The previous prime is 18283847. The next prime is 18283877. The reversal of 18283861 is 16838281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18190225 + 93636 = 4265^2 + 306^2 .

It is an emirp because it is prime and its reverse (16838281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18283861 - 2⁵ = 18283829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18283861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18280861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9141930 + 9141931.

It is an arithmetic number, because the mean of its divisors is an integer number (9141931).

Almost surely, 2^18283861 is an apocalyptic number.

It is an amenable number.

18283861 is a deficient number, since it is larger than the sum of its proper divisors (1).

18283861 is an equidigital number, since it uses as much as digits as its factorization.

18283861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 37.

The square root of 18283861 is about 4275.9631663521. The cubic root of 18283861 is about 263.4446016279. Note that the first 3 decimals are identical.

The spelling of 18283861 in words is "eighteen million, two hundred eighty-three thousand, eight hundred sixty-one".