16621898 has 8 divisors (see below), whose sum is σ = 25112640. Its totient is φ = 8251020.

The previous prime is 16621897. The next prime is 16621949. The reversal of 16621898 is 89812661.

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

It is not an unprimeable number, because it can be changed into a prime (16621897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29618 + ... + 30173.

It is an arithmetic number, because the mean of its divisors is an integer number (3139080).

Almost surely, 2^16621898 is an apocalyptic number.

16621898 is a deficient number, since it is larger than the sum of its proper divisors (8490742).

16621898 is a wasteful number, since it uses less digits than its factorization.

16621898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59932.

The product of its digits is 41472, while the sum is 41.

The square root of 16621898 is about 4076.9961981832. The cubic root of 16621898 is about 255.2075613664.

The spelling of 16621898 in words is "sixteen million, six hundred twenty-one thousand, eight hundred ninety-eight".