18534340 has 24 divisors (see below), whose sum is σ = 42460992. Its totient is φ = 6739680.

The previous prime is 18534331. The next prime is 18534359. The reversal of 18534340 is 4343581.

It is a junction number, because it is equal to n+sod(n) for n = 18534299 and 18534308.

It is an unprimeable number.

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, 41904 + ... + 42343.

It is an arithmetic number, because the mean of its divisors is an integer number (1769208).

Almost surely, 2^18534340 is an apocalyptic number.

18534340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18534340 is an abundant number, since it is smaller than the sum of its proper divisors (23926652).

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

18534340 is a wasteful number, since it uses less digits than its factorization.

18534340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84267 (or 84265 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 18534340 is about 4305.1527266753. The cubic root of 18534340 is about 264.6421656566.

The spelling of 18534340 in words is "eighteen million, five hundred thirty-four thousand, three hundred forty".