18749242 has 8 divisors (see below), whose sum is σ = 28204596. Its totient is φ = 9347712.

The previous prime is 18749239. The next prime is 18749243. The reversal of 18749242 is 24294781.

It can be written as a sum of positive squares in 2 ways, for example, as 18653761 + 95481 = 4319^2 + 309^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18749243) 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 3 ways as a sum of consecutive naturals, for example, 12573 + ... + 13984.

Almost surely, 2^18749242 is an apocalyptic number.

18749242 is a deficient number, since it is larger than the sum of its proper divisors (9455354).

18749242 is a wasteful number, since it uses less digits than its factorization.

18749242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26912.

The product of its digits is 32256, while the sum is 37.

The square root of 18749242 is about 4330.0394917368. The cubic root of 18749242 is about 265.6610622688.

The spelling of 18749242 in words is "eighteen million, seven hundred forty-nine thousand, two hundred forty-two".