21103047703 has 2 divisors, whose sum is σ = 21103047704. Its totient is φ = 21103047702.

The previous prime is 21103047697. The next prime is 21103047727. The reversal of 21103047703 is 30774030112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21103047703 - 2⁹ = 21103047191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21103047743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551523851 + 10551523852.

It is an arithmetic number, because the mean of its divisors is an integer number (10551523852).

Almost surely, 2^21103047703 is an apocalyptic number.

21103047703 is a deficient number, since it is larger than the sum of its proper divisors (1).

21103047703 is an equidigital number, since it uses as much as digits as its factorization.

21103047703 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 28.

Adding to 21103047703 its reverse (30774030112), we get a palindrome (51877077815).

The spelling of 21103047703 in words is "twenty-one billion, one hundred three million, forty-seven thousand, seven hundred three".