18368911 has 8 divisors (see below), whose sum is σ = 20070144. Its totient is φ = 16672920.

The previous prime is 18368887. The next prime is 18368923. The reversal of 18368911 is 11986381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18368911 - 2⁵ = 18368879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18368981) 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 in 7 ways as a sum of consecutive naturals, for example, 11610 + ... + 13096.

It is an arithmetic number, because the mean of its divisors is an integer number (2508768).

Almost surely, 2^18368911 is an apocalyptic number.

18368911 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18368911 is a deficient number, since it is larger than the sum of its proper divisors (1701233).

18368911 is a wasteful number, since it uses less digits than its factorization.

18368911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2621.

The product of its digits is 10368, while the sum is 37.

The square root of 18368911 is about 4285.8967556394. The cubic root of 18368911 is about 263.8524533276.

The spelling of 18368911 in words is "eighteen million, three hundred sixty-eight thousand, nine hundred eleven".