21526621428353 has 16 divisors (see below), whose sum is σ = 22177853732160. Its totient is φ = 20881430054400.

The previous prime is 21526621428337. The next prime is 21526621428379. The reversal of 21526621428353 is 35382412662512.

It is a cyclic number.

It is not a de Polignac number, because 21526621428353 - 2⁴ = 21526621428337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21526621428253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55119458 + ... + 55508628.

It is an arithmetic number, because the mean of its divisors is an integer number (1386115858260).

Almost surely, 2^{21526621428353} is an apocalyptic number.

It is an amenable number.

21526621428353 is a deficient number, since it is larger than the sum of its proper divisors (651232303807).

21526621428353 is a wasteful number, since it uses less digits than its factorization.

21526621428353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396928.

The product of its digits is 4147200, while the sum is 50.

The spelling of 21526621428353 in words is "twenty-one trillion, five hundred twenty-six billion, six hundred twenty-one million, four hundred twenty-eight thousand, three hundred fifty-three".