21136046336 has 36 divisors (see below), whose sum is σ = 43644356700. Its totient is φ = 10203604992.

The previous prime is 21136046287. The next prime is 21136046339. The reversal of 21136046336 is 63364063112.

It can be written as a sum of positive squares in 2 ways, for example, as 10290073600 + 10845972736 = 101440^2 + 104144^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21136046296 and 21136046305.

It is not an unprimeable number, because it can be changed into a prime (21136046339) 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 3 ways as a sum of consecutive naturals, for example, 1416071 + ... + 1430918.

Almost surely, 2^21136046336 is an apocalyptic number.

It is an amenable number.

21136046336 is an abundant number, since it is smaller than the sum of its proper divisors (22508310364).

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

21136046336 is an equidigital number, since it uses as much as digits as its factorization.

21136046336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2847034 (or 2847020 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 35.

The spelling of 21136046336 in words is "twenty-one billion, one hundred thirty-six million, forty-six thousand, three hundred thirty-six".