18080573 has 4 divisors (see below), whose sum is σ = 20663520. Its totient is φ = 15497628.

The previous prime is 18080561. The next prime is 18080581. The reversal of 18080573 is 37508081.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37508081 = 13 ⋅2885237.

It is a cyclic number.

It is not a de Polignac number, because 18080573 - 2²⁰ = 17031997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18080273) 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, 1291463 + ... + 1291476.

It is an arithmetic number, because the mean of its divisors is an integer number (5165880).

Almost surely, 2^18080573 is an apocalyptic number.

It is an amenable number.

18080573 is a deficient number, since it is larger than the sum of its proper divisors (2582947).

18080573 is an equidigital number, since it uses as much as digits as its factorization.

18080573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2582946.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 18080573 is about 4252.1257036922. The cubic root of 18080573 is about 262.4645962835.

The spelling of 18080573 in words is "eighteen million, eighty thousand, five hundred seventy-three".