19394424 has 128 divisors (see below), whose sum is σ = 62668800. Its totient is φ = 5443200.

The previous prime is 19394413. The next prime is 19394429. The reversal of 19394424 is 42449391.

It is a super-2 number, since 2×19394424² = 752287364583552, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19394429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 152649 + ... + 152775.

It is an arithmetic number, because the mean of its divisors is an integer number (489600).

Almost surely, 2^19394424 is an apocalyptic number.

19394424 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 19394424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31334400).

19394424 is an abundant number, since it is smaller than the sum of its proper divisors (43274376).

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

19394424 is a wasteful number, since it uses less digits than its factorization.

19394424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 240 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 19394424 is about 4403.9100808259. The cubic root of 19394424 is about 268.6739922788.

The spelling of 19394424 in words is "nineteen million, three hundred ninety-four thousand, four hundred twenty-four".