21133462236 has 12 divisors (see below), whose sum is σ = 49311411912. Its totient is φ = 7044487408.

The previous prime is 21133462223. The next prime is 21133462267. The reversal of 21133462236 is 63226433112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21133462197 and 21133462206.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 880560915 + ... + 880560938.

It is an arithmetic number, because the mean of its divisors is an integer number (4109284326).

Almost surely, 2^21133462236 is an apocalyptic number.

It is an amenable number.

21133462236 is an abundant number, since it is smaller than the sum of its proper divisors (28177949676).

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

21133462236 is a wasteful number, since it uses less digits than its factorization.

21133462236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761121860 (or 1761121858 counting only the distinct ones).

The product of its digits is 31104, while the sum is 33.

Adding to 21133462236 its reverse (63226433112), we get a palindrome (84359895348).

The spelling of 21133462236 in words is "twenty-one billion, one hundred thirty-three million, four hundred sixty-two thousand, two hundred thirty-six".