21234526650 has 60 divisors (see below), whose sum is σ = 59000536782. Its totient is φ = 5662539360.

The previous prime is 21234526571. The next prime is 21234526667. The reversal of 21234526650 is 5662543212.

21234526650 is a `hidden beast` number, since 2 + 1 + 2 + 345 + 266 + 50 = 666.

21234526650 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 18227430081 + 3007096569 = 135009^2 + 54837^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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 29 ways as a sum of consecutive naturals, for example, 2617497 + ... + 2625596.

Almost surely, 2^21234526650 is an apocalyptic number.

21234526650 is an abundant number, since it is smaller than the sum of its proper divisors (37766010132).

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

21234526650 is a wasteful number, since it uses less digits than its factorization.

21234526650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5243117 (or 5243103 counting only the distinct ones).

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

The spelling of 21234526650 in words is "twenty-one billion, two hundred thirty-four million, five hundred twenty-six thousand, six hundred fifty".