19996001 has 2 divisors, whose sum is σ = 19996002. Its totient is φ = 19996000.

The previous prime is 19995979. The next prime is 19996003. The reversal of 19996001 is 10069991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16000000 + 3996001 = 4000^2 + 1999^2 .

It is an emirp because it is prime and its reverse (10069991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19996001 - 2¹⁰ = 19994977 is a prime.

It is a Sophie Germain prime.

Together with 19996003, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (19996003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9998000 + 9998001.

It is an arithmetic number, because the mean of its divisors is an integer number (9998001).

Almost surely, 2^19996001 is an apocalyptic number.

It is an amenable number.

19996001 is a deficient number, since it is larger than the sum of its proper divisors (1).

19996001 is an equidigital number, since it uses as much as digits as its factorization.

19996001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 19996001 is about 4471.6888308557. The cubic root of 19996001 is about 271.4236688601.

It can be divided in two parts, 1999 and 6001, that added together give a cube (8000 = 20³).

The spelling of 19996001 in words is "nineteen million, nine hundred ninety-six thousand, one".