18373331 has 2 divisors, whose sum is σ = 18373332. Its totient is φ = 18373330.

The previous prime is 18373321. The next prime is 18373363. The reversal of 18373331 is 13337381.

It is a weak prime.

It is an emirp because it is prime and its reverse (13337381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18373331 - 2¹⁰ = 18372307 is a prime.

It is a super-2 number, since 2×18373331² = 675158584071122, which contains 22 as substring.

It is a Chen prime.

It is equal to p_1173629 and since 18373331 and 1173629 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 18373294 and 18373303.

It is not a weakly prime, because it can be changed into another prime (18373301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9186665 + 9186666.

It is an arithmetic number, because the mean of its divisors is an integer number (9186666).

Almost surely, 2^18373331 is an apocalyptic number.

18373331 is a deficient number, since it is larger than the sum of its proper divisors (1).

18373331 is an equidigital number, since it uses as much as digits as its factorization.

18373331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 29.

The square root of 18373331 is about 4286.4123693364. The cubic root of 18373331 is about 263.8736147039.

The spelling of 18373331 in words is "eighteen million, three hundred seventy-three thousand, three hundred thirty-one".