19483561 has 4 divisors (see below), whose sum is σ = 19514052. Its totient is φ = 19453072.

The previous prime is 19483537. The next prime is 19483577. The reversal of 19483561 is 16538491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16538491 = 53 ⋅312047.

It can be written as a sum of positive squares in 2 ways, for example, as 2343961 + 17139600 = 1531^2 + 4140^2 .

It is a cyclic number.

It is not a de Polignac number, because 19483561 - 2⁹ = 19483049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19483561.

It is not an unprimeable number, because it can be changed into a prime (19483501) 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, 14266 + ... + 15571.

It is an arithmetic number, because the mean of its divisors is an integer number (4878513).

Almost surely, 2^19483561 is an apocalyptic number.

It is an amenable number.

19483561 is a deficient number, since it is larger than the sum of its proper divisors (30491).

19483561 is an equidigital number, since it uses as much as digits as its factorization.

19483561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30490.

The product of its digits is 25920, while the sum is 37.

The square root of 19483561 is about 4414.0186904906. The cubic root of 19483561 is about 269.0849729022.

The spelling of 19483561 in words is "nineteen million, four hundred eighty-three thousand, five hundred sixty-one".