18573457 has 4 divisors (see below), whose sum is σ = 21226816. Its totient is φ = 15920100.

The previous prime is 18573449. The next prime is 18573461. The reversal of 18573457 is 75437581.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18573457 - 2³ = 18573449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18573437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1326669 + ... + 1326682.

It is an arithmetic number, because the mean of its divisors is an integer number (5306704).

Almost surely, 2^18573457 is an apocalyptic number.

It is an amenable number.

18573457 is a deficient number, since it is larger than the sum of its proper divisors (2653359).

18573457 is an equidigital number, since it uses as much as digits as its factorization.

18573457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2653358.

The product of its digits is 117600, while the sum is 40.

The square root of 18573457 is about 4309.6933765640. The cubic root of 18573457 is about 264.8282119079.

The spelling of 18573457 in words is "eighteen million, five hundred seventy-three thousand, four hundred fifty-seven".