21796536133 has 4 divisors (see below), whose sum is σ = 21797229388. Its totient is φ = 21795842880.

The previous prime is 21796536131. The next prime is 21796536137. The reversal of 21796536133 is 33163569712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4661202529 + 17135333604 = 68273^2 + 130902^2 .

It is a cyclic number.

It is not a de Polignac number, because 21796536133 - 2¹ = 21796536131 is a prime.

It is the 147637-th Hogben number.

It is a deceptive number, since it divides R_21796536132.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21796536131) by changing a digit.

It is a nontrivial repunit in base 147636.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297108 + ... + 363133.

It is an arithmetic number, because the mean of its divisors is an integer number (5449307347).

Almost surely, 2^21796536133 is an apocalyptic number.

It is an amenable number.

21796536133 is a deficient number, since it is larger than the sum of its proper divisors (693255).

21796536133 is an equidigital number, since it uses as much as digits as its factorization.

21796536133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693254.

The product of its digits is 612360, while the sum is 46.

The spelling of 21796536133 in words is "twenty-one billion, seven hundred ninety-six million, five hundred thirty-six thousand, one hundred thirty-three".