18498673 has 4 divisors (see below), whose sum is σ = 18511780. Its totient is φ = 18485568.

The previous prime is 18498671. The next prime is 18498679. The reversal of 18498673 is 37689481.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15460624 + 3038049 = 3932^2 + 1743^2 .

It is a cyclic number.

It is not a de Polignac number, because 18498673 - 2¹ = 18498671 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18498671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4140 + ... + 7357.

It is an arithmetic number, because the mean of its divisors is an integer number (4627945).

Almost surely, 2^18498673 is an apocalyptic number.

It is an amenable number.

18498673 is a deficient number, since it is larger than the sum of its proper divisors (13107).

18498673 is a wasteful number, since it uses less digits than its factorization.

18498673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13106.

The product of its digits is 290304, while the sum is 46.

The square root of 18498673 is about 4301.0083701383. The cubic root of 18498673 is about 264.4722998234.

The spelling of 18498673 in words is "eighteen million, four hundred ninety-eight thousand, six hundred seventy-three".