21133313084 has 96 divisors (see below), whose sum is σ = 42706440000. Its totient is φ = 9069705216.

The previous prime is 21133313083. The next prime is 21133313137. The reversal of 21133313084 is 48031333112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133313081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13101062 + ... + 13102674.

It is an arithmetic number, because the mean of its divisors is an integer number (444858750).

Almost surely, 2^21133313084 is an apocalyptic number.

It is an amenable number.

21133313084 is an abundant number, since it is smaller than the sum of its proper divisors (21573126916).

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

21133313084 is a wasteful number, since it uses less digits than its factorization.

21133313084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887 (or 1885 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 21133313084 its reverse (48031333112), we get a palindrome (69164646196).

The spelling of 21133313084 in words is "twenty-one billion, one hundred thirty-three million, three hundred thirteen thousand, eighty-four".