19944036 has 192 divisors, whose sum is σ = 65372160. Its totient is φ = 5132160.

The previous prime is 19944007. The next prime is 19944037. The reversal of 19944036 is 63044991.

19944036 = T₄₁₃ + T₄₁₄ + ... + T₅₇₄.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19944037) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 539010 + ... + 539046.

It is an arithmetic number, because the mean of its divisors is an integer number (340480).

Almost surely, 2^19944036 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 19944036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32686080).

19944036 is an abundant number, since it is smaller than the sum of its proper divisors (45428124).

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

19944036 is a wasteful number, since it uses less digits than its factorization.

19944036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 19944036 is about 4465.8746063901. The cubic root of 19944036 is about 271.1883423605.

The spelling of 19944036 in words is "nineteen million, nine hundred forty-four thousand, thirty-six".