19979444 has 12 divisors (see below), whose sum is σ = 35112000. Its totient is φ = 9947448.

The previous prime is 19979441. The next prime is 19979459. The reversal of 19979444 is 44497991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19979441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9494 + ... + 11405.

It is an arithmetic number, because the mean of its divisors is an integer number (2926000).

Almost surely, 2^19979444 is an apocalyptic number.

It is an amenable number.

19979444 is a deficient number, since it is larger than the sum of its proper divisors (15132556).

19979444 is a wasteful number, since it uses less digits than its factorization.

19979444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21142 (or 21140 counting only the distinct ones).

The product of its digits is 326592, while the sum is 47.

The square root of 19979444 is about 4469.8371334983. The cubic root of 19979444 is about 271.3487338333.

The spelling of 19979444 in words is "nineteen million, nine hundred seventy-nine thousand, four hundred forty-four".