18749673 has 6 divisors (see below), whose sum is σ = 27082874. Its totient is φ = 12499776.

The previous prime is 18749659. The next prime is 18749681. The reversal of 18749673 is 37694781.

It can be written as a sum of positive squares in only one way, i.e., 14538969 + 4210704 = 3813^2 + 2052^2 .

It is not a de Polignac number, because 18749673 - 2⁵ = 18749641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18749603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1041640 + ... + 1041657.

Almost surely, 2^18749673 is an apocalyptic number.

It is an amenable number.

18749673 is a deficient number, since it is larger than the sum of its proper divisors (8333201).

18749673 is a wasteful number, since it uses less digits than its factorization.

18749673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2083303 (or 2083300 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 18749673 is about 4330.0892600500. The cubic root of 18749673 is about 265.6630978896.

The spelling of 18749673 in words is "eighteen million, seven hundred forty-nine thousand, six hundred seventy-three".