21252635133 has 8 divisors (see below), whose sum is σ = 28340788128. Its totient is φ = 14166452784.

The previous prime is 21252635113. The next prime is 21252635141. The reversal of 21252635133 is 33153625212.

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

It is not a de Polignac number, because 21252635133 - 2⁶ = 21252635069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21252635094 and 21252635103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21252635113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467310 + ... + 510767.

It is an arithmetic number, because the mean of its divisors is an integer number (3542598516).

Almost surely, 2^21252635133 is an apocalyptic number.

It is an amenable number.

21252635133 is a deficient number, since it is larger than the sum of its proper divisors (7088152995).

21252635133 is an equidigital number, since it uses as much as digits as its factorization.

21252635133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985323.

The product of its digits is 32400, while the sum is 33.

The spelling of 21252635133 in words is "twenty-one billion, two hundred fifty-two million, six hundred thirty-five thousand, one hundred thirty-three".