21510204455041 has 8 divisors (see below), whose sum is σ = 21561681691368. Its totient is φ = 21458729040000.

The previous prime is 21510204455023. The next prime is 21510204455053. The reversal of 21510204455041 is 14055440201512.

It can be written as a sum of positive squares in 4 ways, for example, as 2609100403441 + 18901104051600 = 1615271^2 + 4347540^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21510204455041 - 2²³ = 21510196066433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21510204454988 and 21510204455006.

It is not an unprimeable number, because it can be changed into a prime (21510204455141) 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 in 7 ways as a sum of consecutive naturals, for example, 24877461 + ... + 25727581.

It is an arithmetic number, because the mean of its divisors is an integer number (2695210211421).

Almost surely, 2^{21510204455041} is an apocalyptic number.

It is an amenable number.

21510204455041 is a deficient number, since it is larger than the sum of its proper divisors (51477236327).

21510204455041 is an equidigital number, since it uses as much as digits as its factorization.

21510204455041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910643.

The product of its (nonzero) digits is 32000, while the sum is 34.

Adding to 21510204455041 its reverse (14055440201512), we get a palindrome (35565644656553).

The spelling of 21510204455041 in words is "twenty-one trillion, five hundred ten billion, two hundred four million, four hundred fifty-five thousand, forty-one".