21903900703 has 2 divisors, whose sum is σ = 21903900704. Its totient is φ = 21903900702.

The previous prime is 21903900691. The next prime is 21903900737. The reversal of 21903900703 is 30700930912.

It is an a-pointer prime, because the next prime (21903900737) can be obtained adding 21903900703 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21903900703 - 2¹⁷ = 21903769631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21903900203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10951950351 + 10951950352.

It is an arithmetic number, because the mean of its divisors is an integer number (10951950352).

Almost surely, 2^21903900703 is an apocalyptic number.

21903900703 is a deficient number, since it is larger than the sum of its proper divisors (1).

21903900703 is an equidigital number, since it uses as much as digits as its factorization.

21903900703 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 34.

The spelling of 21903900703 in words is "twenty-one billion, nine hundred three million, nine hundred thousand, seven hundred three".