19828541 has 4 divisors (see below), whose sum is σ = 19845084. Its totient is φ = 19812000.

The previous prime is 19828531. The next prime is 19828591. The reversal of 19828541 is 14582891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14582891 = 43 ⋅339137.

It can be written as a sum of positive squares in 2 ways, for example, as 5736025 + 14092516 = 2395^2 + 3754^2 .

It is a cyclic number.

It is not a de Polignac number, because 19828541 - 2¹⁰ = 19827517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19828495 and 19828504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19828531) 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, 6320 + ... + 8921.

It is an arithmetic number, because the mean of its divisors is an integer number (4961271).

Almost surely, 2^19828541 is an apocalyptic number.

It is an amenable number.

19828541 is a deficient number, since it is larger than the sum of its proper divisors (16543).

19828541 is a wasteful number, since it uses less digits than its factorization.

19828541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16542.

The product of its digits is 23040, while the sum is 38.

The square root of 19828541 is about 4452.9249937541. The cubic root of 19828541 is about 270.6638488535.

The spelling of 19828541 in words is "nineteen million, eight hundred twenty-eight thousand, five hundred forty-one".