19642224 has 80 divisors (see below), whose sum is σ = 59139072. Its totient is φ = 5501184.

The previous prime is 19642159. The next prime is 19642237. The reversal of 19642224 is 42224691.

It is a junction number, because it is equal to n+sod(n) for n = 19642191 and 19642200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17257 + ... + 18359.

Almost surely, 2^19642224 is an apocalyptic number.

19642224 is a gapful number since it is divisible by the number (14) 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 19642224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29569536).

19642224 is an abundant number, since it is smaller than the sum of its proper divisors (39496848).

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

19642224 is a wasteful number, since it uses less digits than its factorization.

19642224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174 (or 1168 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 19642224 is about 4431.9548734165. The cubic root of 19642224 is about 269.8134239135.

The spelling of 19642224 in words is "nineteen million, six hundred forty-two thousand, two hundred twenty-four".