18343480 has 32 divisors (see below), whose sum is σ = 41559840. Its totient is φ = 7286400.

The previous prime is 18343477. The next prime is 18343483. The reversal of 18343480 is 8434381.

It is an interprime number because it is at equal distance from previous prime (18343477) and next prime (18343483).

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18343483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4522 + ... + 7558.

It is an arithmetic number, because the mean of its divisors is an integer number (1298745).

Almost surely, 2^18343480 is an apocalyptic number.

18343480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18343480 is an abundant number, since it is smaller than the sum of its proper divisors (23216360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18343480 is a wasteful number, since it uses less digits than its factorization.

18343480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3199 (or 3195 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 18343480 is about 4282.9289043831. The cubic root of 18343480 is about 263.7306328104.

Subtracting from 18343480 its reverse (8434381), we obtain a palindrome (9909099).

The spelling of 18343480 in words is "eighteen million, three hundred forty-three thousand, four hundred eighty".