18805573 has 12 divisors (see below), whose sum is σ = 20066508. Its totient is φ = 17619840.

The previous prime is 18805547. The next prime is 18805597. The reversal of 18805573 is 37550881.

It can be written as a sum of positive squares in 2 ways, for example, as 2427364 + 16378209 = 1558^2 + 4047^2 .

It is not a de Polignac number, because 18805573 - 2¹³ = 18797381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18805373) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40563 + ... + 41023.

It is an arithmetic number, because the mean of its divisors is an integer number (1672209).

Almost surely, 2^18805573 is an apocalyptic number.

It is an amenable number.

18805573 is a deficient number, since it is larger than the sum of its proper divisors (1260935).

18805573 is a wasteful number, since it uses less digits than its factorization.

18805573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612 (or 593 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 18805573 is about 4336.5392884188. The cubic root of 18805573 is about 265.9268506342.

The spelling of 18805573 in words is "eighteen million, eight hundred five thousand, five hundred seventy-three".