19999104 has 32 divisors (see below), whose sum is σ = 53123640. Its totient is φ = 6666240.

The previous prime is 19999069. The next prime is 19999117. The reversal of 19999104 is 40199991.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25657 + ... + 26424.

Almost surely, 2^19999104 is an apocalyptic number.

It is an amenable number.

19999104 is an abundant number, since it is smaller than the sum of its proper divisors (33124536).

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

19999104 is an equidigital number, since it uses as much as digits as its factorization.

19999104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52098 (or 52086 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 42.

The square root of 19999104 is about 4472.0357780322. The cubic root of 19999104 is about 271.4377080686.

The spelling of 19999104 in words is "nineteen million, nine hundred ninety-nine thousand, one hundred four".