18749347 has 10 divisors (see below), whose sum is σ = 19894148. Its totient is φ = 17666484.

The previous prime is 18749329. The next prime is 18749359. The reversal of 18749347 is 74394781.

It is not a de Polignac number, because 18749347 - 2¹⁹ = 18225059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18749377) 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 9 ways as a sum of consecutive naturals, for example, 279808 + ... + 279874.

Almost surely, 2^18749347 is an apocalyptic number.

18749347 is a deficient number, since it is larger than the sum of its proper divisors (1144801).

18749347 is an frugal number, since it uses more digits than its factorization.

18749347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 90 counting only the distinct ones).

The product of its digits is 169344, while the sum is 43.

The square root of 18749347 is about 4330.0516163205. The cubic root of 18749347 is about 265.6615581885.

The spelling of 18749347 in words is "eighteen million, seven hundred forty-nine thousand, three hundred forty-seven".