18822143 has 2 divisors, whose sum is σ = 18822144. Its totient is φ = 18822142.

The previous prime is 18822091. The next prime is 18822161. The reversal of 18822143 is 34122881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18822143 - 2⁶ = 18822079 is a prime.

It is a super-2 number, since 2×18822143² = 708546134224898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18822163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9411071 + 9411072.

It is an arithmetic number, because the mean of its divisors is an integer number (9411072).

Almost surely, 2^18822143 is an apocalyptic number.

18822143 is a deficient number, since it is larger than the sum of its proper divisors (1).

18822143 is an equidigital number, since it uses as much as digits as its factorization.

18822143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 29.

The square root of 18822143 is about 4338.4493773698. The cubic root of 18822143 is about 266.0049323524.

The spelling of 18822143 in words is "eighteen million, eight hundred twenty-two thousand, one hundred forty-three".