18053520 has 40 divisors (see below), whose sum is σ = 55966656. Its totient is φ = 4814208.

The previous prime is 18053513. The next prime is 18053533. The reversal of 18053520 is 2535081.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 37372 + ... + 37851.

Almost surely, 2^18053520 is an apocalyptic number.

18053520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18053520 is an abundant number, since it is smaller than the sum of its proper divisors (37913136).

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

18053520 is a wasteful number, since it uses less digits than its factorization.

18053520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75239 (or 75233 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 18053520 is about 4248.9433980697. The cubic root of 18053520 is about 262.3336270011. Note that the first 3 decimals are identical.

The spelling of 18053520 in words is "eighteen million, fifty-three thousand, five hundred twenty".