19580641 has 2 divisors, whose sum is σ = 19580642. Its totient is φ = 19580640.

The previous prime is 19580633. The next prime is 19580647. The reversal of 19580641 is 14608591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19580625 + 16 = 4425^2 + 4^2 .

It is an emirp because it is prime and its reverse (14608591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19580641 - 2³ = 19580633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19580597 and 19580606.

It is not a weakly prime, because it can be changed into another prime (19580647) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9790320 + 9790321.

It is an arithmetic number, because the mean of its divisors is an integer number (9790321).

Almost surely, 2^19580641 is an apocalyptic number.

It is an amenable number.

19580641 is a deficient number, since it is larger than the sum of its proper divisors (1).

19580641 is an equidigital number, since it uses as much as digits as its factorization.

19580641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 19580641 is about 4425.0018079092. The cubic root of 19580641 is about 269.5311524943.

The spelling of 19580641 in words is "nineteen million, five hundred eighty thousand, six hundred forty-one".