19804992 has 112 divisors (see below), whose sum is σ = 56692800. Its totient is φ = 6082560.

The previous prime is 19804991. The next prime is 19804997. The reversal of 19804992 is 29940891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19804991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222484 + ... + 222572.

Almost surely, 2^19804992 is an apocalyptic number.

19804992 is a gapful number since it is divisible by the number (12) 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 19804992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28346400).

19804992 is an abundant number, since it is smaller than the sum of its proper divisors (36887808).

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

19804992 is a wasteful number, since it uses less digits than its factorization.

19804992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 19804992 is about 4450.2799911916. The cubic root of 19804992 is about 270.5566567693.

The spelling of 19804992 in words is "nineteen million, eight hundred four thousand, nine hundred ninety-two".