18494573 has 4 divisors (see below), whose sum is σ = 18525948. Its totient is φ = 18463200.

The previous prime is 18494563. The next prime is 18494579. The reversal of 18494573 is 37549481.

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 8369449 + 10125124 = 2893^2 + 3182^2 .

It is a cyclic number.

It is not a de Polignac number, because 18494573 - 2¹⁴ = 18478189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18494573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18494579) 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, 14786 + ... + 15987.

It is an arithmetic number, because the mean of its divisors is an integer number (4631487).

Almost surely, 2^18494573 is an apocalyptic number.

It is an amenable number.

18494573 is a deficient number, since it is larger than the sum of its proper divisors (31375).

18494573 is an equidigital number, since it uses as much as digits as its factorization.

18494573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31374.

The product of its digits is 120960, while the sum is 41.

The square root of 18494573 is about 4300.5317113120. The cubic root of 18494573 is about 264.4527593849.

The spelling of 18494573 in words is "eighteen million, four hundred ninety-four thousand, five hundred seventy-three".