19944249 has 8 divisors (see below), whose sum is σ = 28637952. Its totient is φ = 12273360.

The previous prime is 19944241. The next prime is 19944251. The reversal of 19944249 is 94244991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19944249 - 2³ = 19944241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19944249.

It is not an unprimeable number, because it can be changed into a prime (19944241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255657 + ... + 255734.

It is an arithmetic number, because the mean of its divisors is an integer number (3579744).

Almost surely, 2^19944249 is an apocalyptic number.

It is an amenable number.

19944249 is a deficient number, since it is larger than the sum of its proper divisors (8693703).

19944249 is a wasteful number, since it uses less digits than its factorization.

19944249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511407.

The product of its digits is 93312, while the sum is 42.

The square root of 19944249 is about 4465.8984538388. The cubic root of 19944249 is about 271.1893077771.

The spelling of 19944249 in words is "nineteen million, nine hundred forty-four thousand, two hundred forty-nine".