18423337 has 2 divisors, whose sum is σ = 18423338. Its totient is φ = 18423336.

The previous prime is 18423319. The next prime is 18423341. The reversal of 18423337 is 73332481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14017536 + 4405801 = 3744^2 + 2099^2 .

It is a cyclic number.

It is not a de Polignac number, because 18423337 - 2¹⁵ = 18390569 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18423299 and 18423308.

It is not a weakly prime, because it can be changed into another prime (18423137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9211668 + 9211669.

It is an arithmetic number, because the mean of its divisors is an integer number (9211669).

Almost surely, 2^18423337 is an apocalyptic number.

It is an amenable number.

18423337 is a deficient number, since it is larger than the sum of its proper divisors (1).

18423337 is an equidigital number, since it uses as much as digits as its factorization.

18423337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 31.

The square root of 18423337 is about 4292.2414890125. The cubic root of 18423337 is about 264.1127894626.

The spelling of 18423337 in words is "eighteen million, four hundred twenty-three thousand, three hundred thirty-seven".