19421696 has 40 divisors (see below), whose sum is σ = 44357280. Its totient is φ = 8322048.

The previous prime is 19421687. The next prime is 19421711. The reversal of 19421696 is 69612491.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875 + ... + 6293.

It is an arithmetic number, because the mean of its divisors is an integer number (1108932).

Almost surely, 2^19421696 is an apocalyptic number.

19421696 is a gapful number since it is divisible by the number (16) 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 19421696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22178640).

19421696 is an abundant number, since it is smaller than the sum of its proper divisors (24935584).

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

19421696 is an frugal number, since it uses more digits than its factorization.

19421696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5444 (or 5428 counting only the distinct ones).

The product of its digits is 23328, while the sum is 38.

The square root of 19421696 is about 4407.0053324225. The cubic root of 19421696 is about 268.7998677248.

It can be divided in two parts, 194 and 21696, that multiplied together give a palindrome (4209024).

The spelling of 19421696 in words is "nineteen million, four hundred twenty-one thousand, six hundred ninety-six".