19983669801983 has 2 divisors, whose sum is σ = 19983669801984. Its totient is φ = 19983669801982.

The previous prime is 19983669801947. The next prime is 19983669802013. The reversal of 19983669801983 is 38910896638991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19983669801983 - 2⁶ = 19983669801919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19983669801898 and 19983669801907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19983669801923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9991834900991 + 9991834900992.

It is an arithmetic number, because the mean of its divisors is an integer number (9991834900992).

Almost surely, 2^{19983669801983} is an apocalyptic number.

19983669801983 is a deficient number, since it is larger than the sum of its proper divisors (1).

19983669801983 is an equidigital number, since it uses as much as digits as its factorization.

19983669801983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088391168, while the sum is 80.

The spelling of 19983669801983 in words is "nineteen trillion, nine hundred eighty-three billion, six hundred sixty-nine million, eight hundred one thousand, nine hundred eighty-three".