18949234 has 4 divisors (see below), whose sum is σ = 28423854. Its totient is φ = 9474616.

The previous prime is 18949211. The next prime is 18949243. The reversal of 18949234 is 43294981.

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., 18948609 + 625 = 4353^2 + 25^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4737307 + ... + 4737310.

Almost surely, 2^18949234 is an apocalyptic number.

18949234 is a deficient number, since it is larger than the sum of its proper divisors (9474620).

18949234 is an equidigital number, since it uses as much as digits as its factorization.

18949234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9474619.

The product of its digits is 62208, while the sum is 40.

The square root of 18949234 is about 4353.0717889784. The cubic root of 18949234 is about 266.6022966159.

The spelling of 18949234 in words is "eighteen million, nine hundred forty-nine thousand, two hundred thirty-four".