19800504 has 96 divisors (see below), whose sum is σ = 57486000. Its totient is φ = 6314112.

The previous prime is 19800497. The next prime is 19800553. The reversal of 19800504 is 40500891.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 181602 + ... + 181710.

Almost surely, 2^19800504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19800504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28743000).

19800504 is an abundant number, since it is smaller than the sum of its proper divisors (37685496).

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

19800504 is a wasteful number, since it uses less digits than its factorization.

19800504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 19800504 is about 4449.7757246855. The cubic root of 19800504 is about 270.5362183194.

The spelling of 19800504 in words is "nineteen million, eight hundred thousand, five hundred four".