19918104 has 24 divisors (see below), whose sum is σ = 49849980. Its totient is φ = 6632080.

The previous prime is 19918103. The next prime is 19918117. The reversal of 19918104 is 40181991.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19918103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21409 + ... + 22319.

Almost surely, 2^19918104 is an apocalyptic number.

It is an amenable number.

19918104 is an abundant number, since it is smaller than the sum of its proper divisors (29931876).

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

19918104 is an frugal number, since it uses more digits than its factorization.

19918104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1831 (or 916 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 19918104 is about 4462.9703113510. The cubic root of 19918104 is about 271.0707548897.

The spelling of 19918104 in words is "nineteen million, nine hundred eighteen thousand, one hundred four".