19944430 has 48 divisors (see below), whose sum is σ = 40334112. Its totient is φ = 7092800.

The previous prime is 19944391. The next prime is 19944469. The reversal of 19944430 is 3444991.

It is an interprime number because it is at equal distance from previous prime (19944391) and next prime (19944469).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63975 + ... + 64285.

It is an arithmetic number, because the mean of its divisors is an integer number (840294).

Almost surely, 2^19944430 is an apocalyptic number.

19944430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19944430 is an abundant number, since it is smaller than the sum of its proper divisors (20389682).

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

19944430 is a wasteful number, since it uses less digits than its factorization.

19944430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 19944430 is about 4465.9187184722. The cubic root of 19944430 is about 271.1901281492.

It can be divided in two parts, 19 and 944430, that added together give a palindrome (944449).

The spelling of 19944430 in words is "nineteen million, nine hundred forty-four thousand, four hundred thirty".