19972003 has 2 divisors, whose sum is σ = 19972004. Its totient is φ = 19972002.

The previous prime is 19971989. The next prime is 19972019. The reversal of 19972003 is 30027991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19972003 - 2²¹ = 17874851 is a prime.

It is not a weakly prime, because it can be changed into another prime (19972033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9986001 + 9986002.

It is an arithmetic number, because the mean of its divisors is an integer number (9986002).

Almost surely, 2^19972003 is an apocalyptic number.

19972003 is a deficient number, since it is larger than the sum of its proper divisors (1).

19972003 is an equidigital number, since it uses as much as digits as its factorization.

19972003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 19972003 is about 4469.0046990353. The cubic root of 19972003 is about 271.3150432621.

Adding to 19972003 its reverse (30027991), we get a palindrome (49999994).

The spelling of 19972003 in words is "nineteen million, nine hundred seventy-two thousand, three".