18387343 has 8 divisors (see below), whose sum is σ = 20176128. Its totient is φ = 16652064.

The previous prime is 18387331. The next prime is 18387349. The reversal of 18387343 is 34378381.

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

It is not a de Polignac number, because 18387343 - 2⁹ = 18386831 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 (18387349) 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, 12655 + ... + 14032.

It is an arithmetic number, because the mean of its divisors is an integer number (2522016).

Almost surely, 2^18387343 is an apocalyptic number.

18387343 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18387343 is a deficient number, since it is larger than the sum of its proper divisors (1788785).

18387343 is a wasteful number, since it uses less digits than its factorization.

18387343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26753.

The product of its digits is 48384, while the sum is 37.

The square root of 18387343 is about 4288.0465249342. The cubic root of 18387343 is about 263.9406767149.

The spelling of 18387343 in words is "eighteen million, three hundred eighty-seven thousand, three hundred forty-three".