21252614535305 has 8 divisors (see below), whose sum is σ = 25789689549000. Its totient is φ = 16811056890496.

The previous prime is 21252614535289. The next prime is 21252614535311. The reversal of 21252614535305 is 50353541625212.

It can be written as a sum of positive squares in 4 ways, for example, as 1659624133696 + 19592990401609 = 1288264^2 + 4426397^2 .

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 21252614535305 - 2⁴ = 21252614535289 is a prime.

It is a super-2 number, since 2×21252614535305² (a number of 27 digits) contains 22 as substring.

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, 23879341730 + ... + 23879342619.

It is an arithmetic number, because the mean of its divisors is an integer number (3223711193625).

Almost surely, 2^{21252614535305} is an apocalyptic number.

It is an amenable number.

21252614535305 is a deficient number, since it is larger than the sum of its proper divisors (4537075013695).

21252614535305 is an equidigital number, since it uses as much as digits as its factorization.

21252614535305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47758684443.

The product of its (nonzero) digits is 1080000, while the sum is 44.

The spelling of 21252614535305 in words is "twenty-one trillion, two hundred fifty-two billion, six hundred fourteen million, five hundred thirty-five thousand, three hundred five".