16898181 has 8 divisors (see below), whose sum is σ = 22550304. Its totient is φ = 11255760.

The previous prime is 16898171. The next prime is 16898207. The reversal of 16898181 is 18189861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16898181 - 2¹¹ = 16896133 is a prime.

It is a super-2 number, since 2×16898181² = 571097042217522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16898171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4335 + ... + 7251.

It is an arithmetic number, because the mean of its divisors is an integer number (2818788).

Almost surely, 2^16898181 is an apocalyptic number.

It is an amenable number.

16898181 is a deficient number, since it is larger than the sum of its proper divisors (5652123).

16898181 is a wasteful number, since it uses less digits than its factorization.

16898181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4851.

The product of its digits is 27648, while the sum is 42.

The square root of 16898181 is about 4110.7397144553. The cubic root of 16898181 is about 256.6137870111.

It can be divided in two parts, 1689 and 8181, that added together give a triangular number (9870 = T₁₄₀).

The spelling of 16898181 in words is "sixteen million, eight hundred ninety-eight thousand, one hundred eighty-one".