18849563 has 4 divisors (see below), whose sum is σ = 18864720. Its totient is φ = 18834408.

The previous prime is 18849559. The next prime is 18849601. The reversal of 18849563 is 36594881.

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

It is a cyclic number.

It is not a de Polignac number, because 18849563 - 2² = 18849559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18849533) 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, 5528 + ... + 8261.

It is an arithmetic number, because the mean of its divisors is an integer number (4716180).

Almost surely, 2^18849563 is an apocalyptic number.

18849563 is a deficient number, since it is larger than the sum of its proper divisors (15157).

18849563 is a wasteful number, since it uses less digits than its factorization.

18849563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15156.

The product of its digits is 207360, while the sum is 44.

The square root of 18849563 is about 4341.6083425385. The cubic root of 18849563 is about 266.1340412115.

The spelling of 18849563 in words is "eighteen million, eight hundred forty-nine thousand, five hundred sixty-three".