18343340 has 24 divisors (see below), whose sum is σ = 40787712. Its totient is φ = 6905600.

The previous prime is 18343337. The next prime is 18343343. The reversal of 18343340 is 4334381.

It is an interprime number because it is at equal distance from previous prime (18343337) and next prime (18343343).

It is not an unprimeable number, because it can be changed into a prime (18343343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26636 + ... + 27315.

It is an arithmetic number, because the mean of its divisors is an integer number (1699488).

Almost surely, 2^18343340 is an apocalyptic number.

18343340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18343340 is an abundant number, since it is smaller than the sum of its proper divisors (22444372).

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

18343340 is a wasteful number, since it uses less digits than its factorization.

18343340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53977 (or 53975 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 18343340 is about 4282.9125603963. The cubic root of 18343340 is about 263.7299618657.

The spelling of 18343340 in words is "eighteen million, three hundred forty-three thousand, three hundred forty".