18532442 has 4 divisors (see below), whose sum is σ = 27798666. Its totient is φ = 9266220.

The previous prime is 18532403. The next prime is 18532447. The reversal of 18532442 is 24423581.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12187081 + 6345361 = 3491^2 + 2519^2 .

It is not an unprimeable number, because it can be changed into a prime (18532447) 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 as a sum of consecutive naturals, namely, 4633109 + ... + 4633112.

Almost surely, 2^18532442 is an apocalyptic number.

18532442 is a deficient number, since it is larger than the sum of its proper divisors (9266224).

18532442 is an equidigital number, since it uses as much as digits as its factorization.

18532442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9266223.

The product of its digits is 7680, while the sum is 29.

The square root of 18532442 is about 4304.9322875046. The cubic root of 18532442 is about 264.6331318312.

The spelling of 18532442 in words is "eighteen million, five hundred thirty-two thousand, four hundred forty-two".