18253540 has 24 divisors (see below), whose sum is σ = 38630592. Its totient is φ = 7244640.

The previous prime is 18253519. The next prime is 18253553. The reversal of 18253540 is 4535281.

It is a junction number, because it is equal to n+sod(n) for n = 18253499 and 18253508.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 864 + ... + 6103.

It is an arithmetic number, because the mean of its divisors is an integer number (1609608).

Almost surely, 2^18253540 is an apocalyptic number.

18253540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18253540 is an abundant number, since it is smaller than the sum of its proper divisors (20377052).

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

18253540 is a wasteful number, since it uses less digits than its factorization.

18253540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7107 (or 7105 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 18253540 is about 4272.4161782298. The cubic root of 18253540 is about 263.2988934646.

The spelling of 18253540 in words is "eighteen million, two hundred fifty-three thousand, five hundred forty".