21488044681459 has 2 divisors, whose sum is σ = 21488044681460. Its totient is φ = 21488044681458.

The previous prime is 21488044681409. The next prime is 21488044681487. The reversal of 21488044681459 is 95418644088412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21488044681459 - 2¹³ = 21488044673267 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21488044681459.

It is not a weakly prime, because it can be changed into another prime (21488044681409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10744022340729 + 10744022340730.

It is an arithmetic number, because the mean of its divisors is an integer number (10744022340730).

Almost surely, 2^{21488044681459} is an apocalyptic number.

21488044681459 is a deficient number, since it is larger than the sum of its proper divisors (1).

21488044681459 is an equidigital number, since it uses as much as digits as its factorization.

21488044681459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70778880, while the sum is 64.

The spelling of 21488044681459 in words is "twenty-one trillion, four hundred eighty-eight billion, forty-four million, six hundred eighty-one thousand, four hundred fifty-nine".