19660943 has 2 divisors, whose sum is σ = 19660944. Its totient is φ = 19660942.

The previous prime is 19660939. The next prime is 19660951. The reversal of 19660943 is 34906691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19660943 - 2² = 19660939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19660897 and 19660906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19660903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9830471 + 9830472.

It is an arithmetic number, because the mean of its divisors is an integer number (9830472).

Almost surely, 2^19660943 is an apocalyptic number.

19660943 is a deficient number, since it is larger than the sum of its proper divisors (1).

19660943 is an equidigital number, since it uses as much as digits as its factorization.

19660943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 19660943 is about 4434.0661925596. The cubic root of 19660943 is about 269.8991072508.

The spelling of 19660943 in words is "nineteen million, six hundred sixty thousand, nine hundred forty-three".