21488850727 has 2 divisors, whose sum is σ = 21488850728. Its totient is φ = 21488850726.

The previous prime is 21488850707. The next prime is 21488850827. The reversal of 21488850727 is 72705888412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21488850727 - 2¹¹ = 21488848679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21488850707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10744425363 + 10744425364.

It is an arithmetic number, because the mean of its divisors is an integer number (10744425364).

Almost surely, 2^21488850727 is an apocalyptic number.

21488850727 is a deficient number, since it is larger than the sum of its proper divisors (1).

21488850727 is an equidigital number, since it uses as much as digits as its factorization.

21488850727 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2007040, while the sum is 52.

The spelling of 21488850727 in words is "twenty-one billion, four hundred eighty-eight million, eight hundred fifty thousand, seven hundred twenty-seven".