16693881 has 8 divisors (see below), whose sum is σ = 23567904. Its totient is φ = 10474560.

The previous prime is 16693877. The next prime is 16693889. The reversal of 16693881 is 18839661.

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

It is not a de Polignac number, because 16693881 - 2² = 16693877 is a prime.

It is a super-2 number, since 2×16693881² = 557371325684322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16693889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163615 + ... + 163716.

It is an arithmetic number, because the mean of its divisors is an integer number (2945988).

Almost surely, 2^16693881 is an apocalyptic number.

It is an amenable number.

16693881 is a deficient number, since it is larger than the sum of its proper divisors (6874023).

16693881 is a wasteful number, since it uses less digits than its factorization.

16693881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327351.

The product of its digits is 62208, while the sum is 42.

The square root of 16693881 is about 4085.8146066605. The cubic root of 16693881 is about 255.5754325294.

The spelling of 16693881 in words is "sixteen million, six hundred ninety-three thousand, eight hundred eighty-one".