18228983 has 2 divisors, whose sum is σ = 18228984. Its totient is φ = 18228982.

The previous prime is 18228971. The next prime is 18228989. The reversal of 18228983 is 38982281.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18228983 - 2⁴ = 18228967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18228983.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18228989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9114491 + 9114492.

It is an arithmetic number, because the mean of its divisors is an integer number (9114492).

Almost surely, 2^18228983 is an apocalyptic number.

18228983 is a deficient number, since it is larger than the sum of its proper divisors (1).

18228983 is an equidigital number, since it uses as much as digits as its factorization.

18228983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 41.

The square root of 18228983 is about 4269.5413102580. The cubic root of 18228983 is about 263.1807660101.

The spelling of 18228983 in words is "eighteen million, two hundred twenty-eight thousand, nine hundred eighty-three".