18133669 has 2 divisors, whose sum is σ = 18133670. Its totient is φ = 18133668.

The previous prime is 18133649. The next prime is 18133673. The reversal of 18133669 is 96633181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17388900 + 744769 = 4170^2 + 863^2 .

It is a cyclic number.

It is not a de Polignac number, because 18133669 - 2⁷ = 18133541 is a prime.

It is a super-2 number, since 2×18133669² = 657659902803122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18133649) 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, 9066834 + 9066835.

It is an arithmetic number, because the mean of its divisors is an integer number (9066835).

Almost surely, 2^18133669 is an apocalyptic number.

It is an amenable number.

18133669 is a deficient number, since it is larger than the sum of its proper divisors (1).

18133669 is an equidigital number, since it uses as much as digits as its factorization.

18133669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 37.

The square root of 18133669 is about 4258.3645921879. The cubic root of 18133669 is about 262.7212658952.

It can be divided in two parts, 18 and 133669, that multiplied together give a palindrome (2406042).

The spelling of 18133669 in words is "eighteen million, one hundred thirty-three thousand, six hundred sixty-nine".