16885021998 has 16 divisors (see below), whose sum is σ = 36367739856. Its totient is φ = 5195391360.

The previous prime is 16885021997. The next prime is 16885022009. The reversal of 16885021998 is 89912058861.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16885021997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108237243 + ... + 108237398.

It is an arithmetic number, because the mean of its divisors is an integer number (2272983741).

Almost surely, 2^16885021998 is an apocalyptic number.

16885021998 is an abundant number, since it is smaller than the sum of its proper divisors (19482717858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16885021998 is a wasteful number, since it uses less digits than its factorization.

16885021998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216474659.

The product of its (nonzero) digits is 2488320, while the sum is 57.

The spelling of 16885021998 in words is "sixteen billion, eight hundred eighty-five million, twenty-one thousand, nine hundred ninety-eight".