18529490 has 64 divisors (see below), whose sum is σ = 42177024. Its totient is φ = 5710848.

The previous prime is 18529477. The next prime is 18529493. The reversal of 18529490 is 9492581.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (18529493) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 27032 + ... + 27708.

It is an arithmetic number, because the mean of its divisors is an integer number (659016).

Almost surely, 2^18529490 is an apocalyptic number.

18529490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18529490 is an abundant number, since it is smaller than the sum of its proper divisors (23647534).

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

18529490 is a wasteful number, since it uses less digits than its factorization.

18529490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 18529490 is about 4304.5894113144. The cubic root of 18529490 is about 264.6190801035.

The spelling of 18529490 in words is "eighteen million, five hundred twenty-nine thousand, four hundred ninety".