18259340 has 24 divisors (see below), whose sum is σ = 41830992. Its totient is φ = 6639680.

The previous prime is 18259337. The next prime is 18259363. The reversal of 18259340 is 4395281.

It is a junction number, because it is equal to n+sod(n) for n = 18259297 and 18259306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41279 + ... + 41718.

It is an arithmetic number, because the mean of its divisors is an integer number (1742958).

Almost surely, 2^18259340 is an apocalyptic number.

18259340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18259340 is an abundant number, since it is smaller than the sum of its proper divisors (23571652).

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

18259340 is a wasteful number, since it uses less digits than its factorization.

18259340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83017 (or 83015 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 18259340 is about 4273.0948971442. The cubic root of 18259340 is about 263.3267779529.

The spelling of 18259340 in words is "eighteen million, two hundred fifty-nine thousand, three hundred forty".