19424856 has 48 divisors (see below), whose sum is σ = 53386200. Its totient is φ = 5885440.

The previous prime is 19424851. The next prime is 19424869. The reversal of 19424856 is 65842491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19424851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 441 + ... + 6248.

Almost surely, 2^19424856 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 19424856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26693100).

19424856 is an abundant number, since it is smaller than the sum of its proper divisors (33961344).

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

19424856 is a wasteful number, since it uses less digits than its factorization.

19424856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6720 (or 6705 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 19424856 is about 4407.3638379421. The cubic root of 19424856 is about 268.8144452625.

It can be divided in two parts, 1942485 and 6, that added together give a palindrome (1942491).

The spelling of 19424856 in words is "nineteen million, four hundred twenty-four thousand, eight hundred fifty-six".