18629242 has 4 divisors (see below), whose sum is σ = 27943866. Its totient is φ = 9314620.

The previous prime is 18629231. The next prime is 18629251. The reversal of 18629242 is 24292681.

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., 18584721 + 44521 = 4311^2 + 211^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18629198 and 18629207.

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 as a sum of consecutive naturals, namely, 4657309 + ... + 4657312.

Almost surely, 2^18629242 is an apocalyptic number.

18629242 is a deficient number, since it is larger than the sum of its proper divisors (9314624).

18629242 is an equidigital number, since it uses as much as digits as its factorization.

18629242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9314623.

The product of its digits is 13824, while the sum is 34.

The square root of 18629242 is about 4316.1605623517. The cubic root of 18629242 is about 265.0930822882.

The spelling of 18629242 in words is "eighteen million, six hundred twenty-nine thousand, two hundred forty-two".