19944874 has 8 divisors (see below), whose sum is σ = 30213828. Its totient is φ = 9873600.

The previous prime is 19944863. The next prime is 19944877. The reversal of 19944874 is 47844991.

It can be written as a sum of positive squares in 2 ways, for example, as 19936225 + 8649 = 4465^2 + 93^2 .

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

It is not an unprimeable number, because it can be changed into a prime (19944877) 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 3 ways as a sum of consecutive naturals, for example, 49167 + ... + 49570.

Almost surely, 2^19944874 is an apocalyptic number.

19944874 is a deficient number, since it is larger than the sum of its proper divisors (10268954).

19944874 is a wasteful number, since it uses less digits than its factorization.

19944874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98840.

The product of its digits is 290304, while the sum is 46.

The square root of 19944874 is about 4465.9684280120. The cubic root of 19944874 is about 271.1921405327.

The spelling of 19944874 in words is "nineteen million, nine hundred forty-four thousand, eight hundred seventy-four".