19923803 has 2 divisors, whose sum is σ = 19923804. Its totient is φ = 19923802.

The previous prime is 19923791. The next prime is 19923811. The reversal of 19923803 is 30832991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19923803 - 2¹⁰ = 19922779 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (19923823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9961901 + 9961902.

It is an arithmetic number, because the mean of its divisors is an integer number (9961902).

Almost surely, 2^19923803 is an apocalyptic number.

19923803 is a deficient number, since it is larger than the sum of its proper divisors (1).

19923803 is an equidigital number, since it uses as much as digits as its factorization.

19923803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 19923803 is about 4463.6087418142. The cubic root of 19923803 is about 271.0966054914.

The spelling of 19923803 in words is "nineteen million, nine hundred twenty-three thousand, eight hundred three".