16818131 has 8 divisors (see below), whose sum is σ = 18415728. Its totient is φ = 15232000.

The previous prime is 16818121. The next prime is 16818133. The reversal of 16818131 is 13181861.

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

It is a cyclic number.

It is not a de Polignac number, because 16818131 - 2¹⁰ = 16817107 is a prime.

It is a super-2 number, since 2×16818131² = 565699060666322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16818094 and 16818103.

It is not an unprimeable number, because it can be changed into a prime (16818133) 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, 371 + ... + 5811.

It is an arithmetic number, because the mean of its divisors is an integer number (2301966).

Almost surely, 2^16818131 is an apocalyptic number.

16818131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16818131 is a deficient number, since it is larger than the sum of its proper divisors (1597597).

16818131 is a wasteful number, since it uses less digits than its factorization.

16818131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5733.

The product of its digits is 1152, while the sum is 29.

The square root of 16818131 is about 4100.9914654873. The cubic root of 16818131 is about 256.2079355105.

Adding to 16818131 its reverse (13181861), we get a palindrome (29999992).

The spelling of 16818131 in words is "sixteen million, eight hundred eighteen thousand, one hundred thirty-one".