18532493 has 4 divisors (see below), whose sum is σ = 21180000. Its totient is φ = 15884988.

The previous prime is 18532463. The next prime is 18532517. The reversal of 18532493 is 39423581.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18532493 - 2⁸ = 18532237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18532403) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1323743 + ... + 1323756.

It is an arithmetic number, because the mean of its divisors is an integer number (5295000).

Almost surely, 2^18532493 is an apocalyptic number.

It is an amenable number.

18532493 is a deficient number, since it is larger than the sum of its proper divisors (2647507).

18532493 is an equidigital number, since it uses as much as digits as its factorization.

18532493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2647506.

The product of its digits is 25920, while the sum is 35.

The square root of 18532493 is about 4304.9382109387. The cubic root of 18532493 is about 264.6333745817.

The spelling of 18532493 in words is "eighteen million, five hundred thirty-two thousand, four hundred ninety-three".