18343868 has 6 divisors (see below), whose sum is σ = 32101776. Its totient is φ = 9171932.

The previous prime is 18343861. The next prime is 18343891. The reversal of 18343868 is 86834381.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18343861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2292980 + ... + 2292987.

It is an arithmetic number, because the mean of its divisors is an integer number (5350296).

Almost surely, 2^18343868 is an apocalyptic number.

It is an amenable number.

18343868 is a deficient number, since it is larger than the sum of its proper divisors (13757908).

18343868 is a wasteful number, since it uses less digits than its factorization.

18343868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4585971 (or 4585969 counting only the distinct ones).

The product of its digits is 110592, while the sum is 41.

The square root of 18343868 is about 4282.9742002492. The cubic root of 18343868 is about 263.7324922679.

The spelling of 18343868 in words is "eighteen million, three hundred forty-three thousand, eight hundred sixty-eight".