19994944 has 28 divisors (see below), whose sum is σ = 40278304. Its totient is φ = 9846144.

The previous prime is 19994929. The next prime is 19994951. The reversal of 19994944 is 44949991.

19994944 = T₃₅₇ + T₃₅₈ + ... + T₅₄₈.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1957 + ... + 6619.

Almost surely, 2^19994944 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 19994944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20139152).

19994944 is an abundant number, since it is smaller than the sum of its proper divisors (20283360).

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

19994944 is an equidigital number, since it uses as much as digits as its factorization.

19994944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4742 (or 4732 counting only the distinct ones).

The product of its digits is 419904, while the sum is 49.

The square root of 19994944 is about 4471.5706412848. The cubic root of 19994944 is about 271.4188862393.

The spelling of 19994944 in words is "nineteen million, nine hundred ninety-four thousand, nine hundred forty-four".