19419824 has 40 divisors (see below), whose sum is σ = 39997440. Its totient is φ = 9108288.

The previous prime is 19419823. The next prime is 19419839. The reversal of 19419824 is 42891491.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19419823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38357 + ... + 38859.

It is an arithmetic number, because the mean of its divisors is an integer number (999936).

Almost surely, 2^19419824 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 19419824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19998720).

19419824 is an abundant number, since it is smaller than the sum of its proper divisors (20577616).

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

19419824 is a wasteful number, since it uses less digits than its factorization.

19419824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657 (or 651 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 19419824 is about 4406.7929381808. The cubic root of 19419824 is about 268.7912311718.

The spelling of 19419824 in words is "nineteen million, four hundred nineteen thousand, eight hundred twenty-four".