19873240 has 64 divisors (see below), whose sum is σ = 47808000. Its totient is φ = 7413120.

The previous prime is 19873237. The next prime is 19873241. The reversal of 19873240 is 4237891.

It is a junction number, because it is equal to n+sod(n) for n = 19873196 and 19873205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19873241) 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, 59875 + ... + 60205.

It is an arithmetic number, because the mean of its divisors is an integer number (747000).

Almost surely, 2^19873240 is an apocalyptic number.

19873240 is a gapful number since it is divisible by the number (10) 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 19873240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23904000).

19873240 is an abundant number, since it is smaller than the sum of its proper divisors (27934760).

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

19873240 is a wasteful number, since it uses less digits than its factorization.

19873240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 19873240 is about 4457.9412288634. The cubic root of 19873240 is about 270.8670798712.

The spelling of 19873240 in words is "nineteen million, eight hundred seventy-three thousand, two hundred forty".