19802941 has 2 divisors, whose sum is σ = 19802942. Its totient is φ = 19802940.

The previous prime is 19802897. The next prime is 19802957. The reversal of 19802941 is 14920891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19802500 + 441 = 4450^2 + 21^2 .

It is an emirp because it is prime and its reverse (14920891) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19802941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19802897 and 19802906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19802971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9901470 + 9901471.

It is an arithmetic number, because the mean of its divisors is an integer number (9901471).

Almost surely, 2^19802941 is an apocalyptic number.

It is an amenable number.

19802941 is a deficient number, since it is larger than the sum of its proper divisors (1).

19802941 is an equidigital number, since it uses as much as digits as its factorization.

19802941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 19802941 is about 4450.0495502859. The cubic root of 19802941 is about 270.5473168537.

The spelling of 19802941 in words is "nineteen million, eight hundred two thousand, nine hundred forty-one".