21041055035545 has 8 divisors (see below), whose sum is σ = 25249296509640. Its totient is φ = 16832823717120.

The previous prime is 21041055035537. The next prime is 21041055035557. The reversal of 21041055035545 is 54553055014012.

It can be written as a sum of positive squares in 4 ways, for example, as 48383721369 + 20992671314176 = 219963^2 + 4581776^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21041055035545 - 2³ = 21041055035537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21041055035498 and 21041055035507.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 3197371 + ... + 7232239.

It is an arithmetic number, because the mean of its divisors is an integer number (3156162063705).

Almost surely, 2^{21041055035545} is an apocalyptic number.

It is an amenable number.

21041055035545 is a deficient number, since it is larger than the sum of its proper divisors (4208241474095).

21041055035545 is a wasteful number, since it uses less digits than its factorization.

21041055035545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5077835.

The product of its (nonzero) digits is 300000, while the sum is 40.

The spelling of 21041055035545 in words is "twenty-one trillion, forty-one billion, fifty-five million, thirty-five thousand, five hundred forty-five".