18361411 has 4 divisors (see below), whose sum is σ = 19441512. Its totient is φ = 17281312.

The previous prime is 18361351. The next prime is 18361423. The reversal of 18361411 is 11416381.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18361411 - 2¹⁵ = 18328643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18361111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540025 + ... + 540058.

It is an arithmetic number, because the mean of its divisors is an integer number (4860378).

Almost surely, 2^18361411 is an apocalyptic number.

18361411 is a deficient number, since it is larger than the sum of its proper divisors (1080101).

18361411 is a wasteful number, since it uses less digits than its factorization.

18361411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080100.

The product of its digits is 576, while the sum is 25.

The square root of 18361411 is about 4285.0217035623. The cubic root of 18361411 is about 263.8165382464.

Adding to 18361411 its reverse (11416381), we get a palindrome (29777792).

The spelling of 18361411 in words is "eighteen million, three hundred sixty-one thousand, four hundred eleven".