19941100 has 18 divisors (see below), whose sum is σ = 43272404. Its totient is φ = 7976400.

The previous prime is 19941071. The next prime is 19941139. The reversal of 19941100 is 114991.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 99606 + ... + 99805.

Almost surely, 2^19941100 is an apocalyptic number.

19941100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19941100 is an abundant number, since it is smaller than the sum of its proper divisors (23331304).

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

19941100 is a wasteful number, since it uses less digits than its factorization.

19941100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199425 (or 199418 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 19941100 is about 4465.5458792851. The cubic root of 19941100 is about 271.1750343212.

The spelling of 19941100 in words is "nineteen million, nine hundred forty-one thousand, one hundred".