19944480 has 96 divisors (see below), whose sum is σ = 64580544. Its totient is φ = 5170176.

The previous prime is 19944469. The next prime is 19944481. The reversal of 19944480 is 8444991.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (19944481) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 17199 + ... + 18321.

It is an arithmetic number, because the mean of its divisors is an integer number (672714).

Almost surely, 2^19944480 is an apocalyptic number.

19944480 is a gapful number since it is divisible by the number (10) 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 19944480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32290272).

19944480 is an abundant number, since it is smaller than the sum of its proper divisors (44636064).

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

19944480 is a wasteful number, since it uses less digits than its factorization.

19944480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178 (or 1170 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 19944480 is about 4465.9243164210. The cubic root of 19944480 is about 271.1903547705.

The spelling of 19944480 in words is "nineteen million, nine hundred forty-four thousand, four hundred eighty".