16981100 has 36 divisors (see below), whose sum is σ = 37643424. Its totient is φ = 6646080.

The previous prime is 16981073. The next prime is 16981103. The reversal of 16981100 is 118961.

It is a self number, because there is not a number n which added to its sum of digits gives 16981100.

It is not an unprimeable number, because it can be changed into a prime (16981103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2894 + ... + 6506.

Almost surely, 2^16981100 is an apocalyptic number.

16981100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16981100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18821712).

16981100 is an abundant number, since it is smaller than the sum of its proper divisors (20662324).

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

16981100 is a wasteful number, since it uses less digits than its factorization.

16981100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3674 (or 3667 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 16981100 is about 4120.8130265762. The cubic root of 16981100 is about 257.0328350604.

The spelling of 16981100 in words is "sixteen million, nine hundred eighty-one thousand, one hundred".