19782941 has 2 divisors, whose sum is σ = 19782942. Its totient is φ = 19782940.

The previous prime is 19782913. The next prime is 19782947. The reversal of 19782941 is 14928791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10956100 + 8826841 = 3310^2 + 2971^2 .

It is an emirp because it is prime and its reverse (14928791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19782941 - 2¹⁴ = 19766557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19782947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9891470 + 9891471.

It is an arithmetic number, because the mean of its divisors is an integer number (9891471).

Almost surely, 2^19782941 is an apocalyptic number.

It is an amenable number.

19782941 is a deficient number, since it is larger than the sum of its proper divisors (1).

19782941 is an equidigital number, since it uses as much as digits as its factorization.

19782941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 41.

The square root of 19782941 is about 4447.8018166281. The cubic root of 19782941 is about 270.4562063303.

It can be divided in two parts, 197 and 82941, that added together give a palindrome (83138).

The spelling of 19782941 in words is "nineteen million, seven hundred eighty-two thousand, nine hundred forty-one".