21488044681439 has 12 divisors (see below), whose sum is σ = 24996385760184. Its totient is φ = 18418258517904.

The previous prime is 21488044681409. The next prime is 21488044681459. The reversal of 21488044681439 is 93418644088412.

It is not a de Polignac number, because 21488044681439 - 2¹⁶ = 21488044615903 is a prime.

It is a super-2 number, since 2×21488044681439² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21488044681409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17442092 + ... + 18633374.

It is an arithmetic number, because the mean of its divisors is an integer number (2083032146682).

Almost surely, 2^{21488044681439} is an apocalyptic number.

21488044681439 is a deficient number, since it is larger than the sum of its proper divisors (3508341078745).

21488044681439 is a wasteful number, since it uses less digits than its factorization.

21488044681439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559414 (or 1559407 counting only the distinct ones).

The product of its (nonzero) digits is 42467328, while the sum is 62.

The spelling of 21488044681439 in words is "twenty-one trillion, four hundred eighty-eight billion, forty-four million, six hundred eighty-one thousand, four hundred thirty-nine".