21903965003 has 2 divisors, whose sum is σ = 21903965004. Its totient is φ = 21903965002.

The previous prime is 21903964991. The next prime is 21903965011. The reversal of 21903965003 is 30056930912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21903965003 - 2⁴ = 21903964987 is a prime.

It is not a weakly prime, because it can be changed into another prime (21903965033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10951982501 + 10951982502.

It is an arithmetic number, because the mean of its divisors is an integer number (10951982502).

Almost surely, 2^21903965003 is an apocalyptic number.

21903965003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21903965003 is an equidigital number, since it uses as much as digits as its factorization.

21903965003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 38.

The spelling of 21903965003 in words is "twenty-one billion, nine hundred three million, nine hundred sixty-five thousand, three".