19439924 has 24 divisors (see below), whose sum is σ = 38996160. Its totient is φ = 8306496.

The previous prime is 19439921. The next prime is 19439933. The reversal of 19439924 is 42993491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19439921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10904 + ... + 12560.

It is an arithmetic number, because the mean of its divisors is an integer number (1624840).

Almost surely, 2^19439924 is an apocalyptic number.

19439924 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19439924 is an abundant number, since it is smaller than the sum of its proper divisors (19556236).

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

19439924 is a wasteful number, since it uses less digits than its factorization.

19439924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2087 (or 2085 counting only the distinct ones).

The product of its digits is 69984, while the sum is 41.

The square root of 19439924 is about 4409.0729184263. The cubic root of 19439924 is about 268.8839343951.

The spelling of 19439924 in words is "nineteen million, four hundred thirty-nine thousand, nine hundred twenty-four".