21758904703 has 2 divisors, whose sum is σ = 21758904704. Its totient is φ = 21758904702.

The previous prime is 21758904701. The next prime is 21758904749. The reversal of 21758904703 is 30740985712.

It is an a-pointer prime, because the next prime (21758904749) can be obtained adding 21758904703 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21758904703 - 2¹ = 21758904701 is a prime.

Together with 21758904701, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21758904701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10879452351 + 10879452352.

It is an arithmetic number, because the mean of its divisors is an integer number (10879452352).

Almost surely, 2^21758904703 is an apocalyptic number.

21758904703 is a deficient number, since it is larger than the sum of its proper divisors (1).

21758904703 is an equidigital number, since it uses as much as digits as its factorization.

21758904703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 21758904703 in words is "twenty-one billion, seven hundred fifty-eight million, nine hundred four thousand, seven hundred three".