21036611116 has 24 divisors (see below), whose sum is σ = 37903463136. Its totient is φ = 10209655680.

The previous prime is 21036611069. The next prime is 21036611119. The reversal of 21036611116 is 61111663012.

It is not an unprimeable number, because it can be changed into a prime (21036611119) 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 7 ways as a sum of consecutive naturals, for example, 293256 + ... + 357871.

It is an arithmetic number, because the mean of its divisors is an integer number (1579310964).

Almost surely, 2^21036611116 is an apocalyptic number.

It is an amenable number.

21036611116 is a deficient number, since it is larger than the sum of its proper divisors (16866852020).

21036611116 is a wasteful number, since it uses less digits than its factorization.

21036611116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651369 (or 651367 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 21036611116 in words is "twenty-one billion, thirty-six million, six hundred eleven thousand, one hundred sixteen".