19944396 has 18 divisors (see below), whose sum is σ = 50415092. Its totient is φ = 6648120.

The previous prime is 19944391. The next prime is 19944469. The reversal of 19944396 is 69344991.

It is a tau number, because it is divible by the number of its divisors (18).

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

It is not an unprimeable number, because it can be changed into a prime (19944391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 276970 + ... + 277041.

Almost surely, 2^19944396 is an apocalyptic number.

It is an amenable number.

19944396 is an abundant number, since it is smaller than the sum of its proper divisors (30470696).

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

19944396 is a wasteful number, since it uses less digits than its factorization.

19944396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554021 (or 554016 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 19944396 is about 4465.9149118630. The cubic root of 19944396 is about 271.1899740466.

The spelling of 19944396 in words is "nineteen million, nine hundred forty-four thousand, three hundred ninety-six".