18881163 has 12 divisors (see below), whose sum is σ = 31169008. Its totient is φ = 10789200.

The previous prime is 18881143. The next prime is 18881167. The reversal of 18881163 is 36118881.

It is not a de Polignac number, because 18881163 - 2¹⁴ = 18864779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18881167) 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, 149788 + ... + 149913.

Almost surely, 2^18881163 is an apocalyptic number.

18881163 is a deficient number, since it is larger than the sum of its proper divisors (12287845).

18881163 is a wasteful number, since it uses less digits than its factorization.

18881163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299714 (or 299711 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 18881163 is about 4345.2460229543. The cubic root of 18881163 is about 266.2826766745.

It can be divided in two parts, 18881 and 163, that added together give a square (19044 = 138²).

The spelling of 18881163 in words is "eighteen million, eight hundred eighty-one thousand, one hundred sixty-three".