21304103803 has 2 divisors, whose sum is σ = 21304103804. Its totient is φ = 21304103802.

The previous prime is 21304103747. The next prime is 21304103827. The reversal of 21304103803 is 30830140312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21304103803 - 2³³ = 12714169211 is a prime.

It is not a weakly prime, because it can be changed into another prime (21304133803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10652051901 + 10652051902.

It is an arithmetic number, because the mean of its divisors is an integer number (10652051902).

Almost surely, 2^21304103803 is an apocalyptic number.

21304103803 is a deficient number, since it is larger than the sum of its proper divisors (1).

21304103803 is an equidigital number, since it uses as much as digits as its factorization.

21304103803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The spelling of 21304103803 in words is "twenty-one billion, three hundred four million, one hundred three thousand, eight hundred three".