18816343 has 24 divisors (see below), whose sum is σ = 23876160. Its totient is φ = 14696640.

The previous prime is 18816341. The next prime is 18816353. The reversal of 18816343 is 34361881.

It is not a de Polignac number, because 18816343 - 2¹ = 18816341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18816299 and 18816308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18816341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69298 + ... + 69568.

It is an arithmetic number, because the mean of its divisors is an integer number (994840).

Almost surely, 2^18816343 is an apocalyptic number.

18816343 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18816343 is a deficient number, since it is larger than the sum of its proper divisors (5059817).

18816343 is a wasteful number, since it uses less digits than its factorization.

18816343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 400 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 18816343 is about 4337.7808842771. The cubic root of 18816343 is about 265.9776066098.

The spelling of 18816343 in words is "eighteen million, eight hundred sixteen thousand, three hundred forty-three".