21250226602530 has 96 divisors (see below), whose sum is σ = 57157112516400. Its totient is φ = 5471195337216.

The previous prime is 21250226602519. The next prime is 21250226602547. The reversal of 21250226602530 is 3520662205212.

21250226602530 is a `hidden beast` number, since 2 + 1 + 25 + 0 + 2 + 26 + 602 + 5 + 3 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 13117138254081 + 8133088348449 = 3621759^2 + 2851857^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 171647412 + ... + 171771168.

Almost surely, 2^{21250226602530} is an apocalyptic number.

21250226602530 is an abundant number, since it is smaller than the sum of its proper divisors (35906885913870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21250226602530 is a wasteful number, since it uses less digits than its factorization.

21250226602530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189588 (or 189585 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 21250226602530 its reverse (3520662205212), we get a palindrome (24770888807742).

The spelling of 21250226602530 in words is "twenty-one trillion, two hundred fifty billion, two hundred twenty-six million, six hundred two thousand, five hundred thirty".