19980441 has 12 divisors (see below), whose sum is σ = 31080868. Its totient is φ = 12295584.

The previous prime is 19980437. The next prime is 19980451. The reversal of 19980441 is 14408991.

It can be written as a sum of positive squares in 2 ways, for example, as 5760000 + 14220441 = 2400^2 + 3771^2 .

It is not a de Polignac number, because 19980441 - 2² = 19980437 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19980396 and 19980405.

It is not an unprimeable number, because it can be changed into a prime (19980421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85270 + ... + 85503.

Almost surely, 2^19980441 is an apocalyptic number.

It is an amenable number.

19980441 is a deficient number, since it is larger than the sum of its proper divisors (11100427).

19980441 is a wasteful number, since it uses less digits than its factorization.

19980441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170792 (or 170789 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 19980441 is about 4469.9486574233. The cubic root of 19980441 is about 271.3532473087.

The spelling of 19980441 in words is "nineteen million, nine hundred eighty thousand, four hundred forty-one".