21013633136 has 10 divisors (see below), whose sum is σ = 40713914232. Its totient is φ = 10506816560.

The previous prime is 21013633133. The next prime is 21013633141. The reversal of 21013633136 is 63133631012.

It is a junction number, because it is equal to n+sod(n) for n = 21013633099 and 21013633108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013633133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656676020 + ... + 656676051.

Almost surely, 2^21013633136 is an apocalyptic number.

It is an amenable number.

21013633136 is a deficient number, since it is larger than the sum of its proper divisors (19700281096).

21013633136 is a wasteful number, since it uses less digits than its factorization.

21013633136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313352079 (or 1313352073 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 29.

The spelling of 21013633136 in words is "twenty-one billion, thirteen million, six hundred thirty-three thousand, one hundred thirty-six".