21040262303 has 2 divisors, whose sum is σ = 21040262304. Its totient is φ = 21040262302.

The previous prime is 21040262267. The next prime is 21040262357. The reversal of 21040262303 is 30326204012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21040262303 - 2²² = 21036067999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21040262363) 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, 10520131151 + 10520131152.

It is an arithmetic number, because the mean of its divisors is an integer number (10520131152).

Almost surely, 2^21040262303 is an apocalyptic number.

21040262303 is a deficient number, since it is larger than the sum of its proper divisors (1).

21040262303 is an equidigital number, since it uses as much as digits as its factorization.

21040262303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21040262303 its reverse (30326204012), we get a palindrome (51366466315).

The spelling of 21040262303 in words is "twenty-one billion, forty million, two hundred sixty-two thousand, three hundred three".