16681898 has 8 divisors (see below), whose sum is σ = 25555392. Its totient is φ = 8163436.

The previous prime is 16681897. The next prime is 16681901. The reversal of 16681898 is 89818661.

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

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16681897) 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, 88640 + ... + 88827.

It is an arithmetic number, because the mean of its divisors is an integer number (3194424).

Almost surely, 2^16681898 is an apocalyptic number.

16681898 is a deficient number, since it is larger than the sum of its proper divisors (8873494).

16681898 is a wasteful number, since it uses less digits than its factorization.

16681898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177516.

The product of its digits is 165888, while the sum is 47.

The square root of 16681898 is about 4084.3479283724. The cubic root of 16681898 is about 255.5142665354.

The spelling of 16681898 in words is "sixteen million, six hundred eighty-one thousand, eight hundred ninety-eight".