21380388703 has 2 divisors, whose sum is σ = 21380388704. Its totient is φ = 21380388702.

The previous prime is 21380388677. The next prime is 21380388751. The reversal of 21380388703 is 30788308312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21380388703 - 2²⁹ = 20843517791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21380388703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21380388773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10690194351 + 10690194352.

It is an arithmetic number, because the mean of its divisors is an integer number (10690194352).

Almost surely, 2^21380388703 is an apocalyptic number.

21380388703 is a deficient number, since it is larger than the sum of its proper divisors (1).

21380388703 is an equidigital number, since it uses as much as digits as its factorization.

21380388703 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 21380388703 in words is "twenty-one billion, three hundred eighty million, three hundred eighty-eight thousand, seven hundred three".