21588099741 has 12 divisors (see below), whose sum is σ = 33581488668. Its totient is φ = 13284984384.

The previous prime is 21588099707. The next prime is 21588099821. The reversal of 21588099741 is 14799088512.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6305948100 + 15282151641 = 79410^2 + 123621^2 .

It is not a de Polignac number, because 21588099741 - 2⁶ = 21588099677 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21588092741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92256720 + ... + 92256953.

It is an arithmetic number, because the mean of its divisors is an integer number (2798457389).

Almost surely, 2^21588099741 is an apocalyptic number.

It is an amenable number.

21588099741 is a deficient number, since it is larger than the sum of its proper divisors (11993388927).

21588099741 is a wasteful number, since it uses less digits than its factorization.

21588099741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184513692 (or 184513689 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 54.

The spelling of 21588099741 in words is "twenty-one billion, five hundred eighty-eight million, ninety-nine thousand, seven hundred forty-one".