19825340 has 48 divisors (see below), whose sum is σ = 43462272. Its totient is φ = 7589376.

The previous prime is 19825327. The next prime is 19825343. The reversal of 19825340 is 4352891.

It is a super-2 number, since 2×19825340² = 786088212231200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19825297 and 19825306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19825343) 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, 53837 + ... + 54203.

It is an arithmetic number, because the mean of its divisors is an integer number (905464).

Almost surely, 2^19825340 is an apocalyptic number.

19825340 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 19825340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21731136).

19825340 is an abundant number, since it is smaller than the sum of its proper divisors (23636932).

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

19825340 is a wasteful number, since it uses less digits than its factorization.

19825340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 19825340 is about 4452.5655525775. The cubic root of 19825340 is about 270.6492832902.

The spelling of 19825340 in words is "nineteen million, eight hundred twenty-five thousand, three hundred forty".