21700733108 has 6 divisors (see below), whose sum is σ = 37976282946. Its totient is φ = 10850366552.

The previous prime is 21700733107. The next prime is 21700733177. The reversal of 21700733108 is 80133700712.

It can be written as a sum of positive squares in only one way, i.e., 15408753424 + 6291979684 = 124132^2 + 79322^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21700733107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2712591635 + ... + 2712591642.

It is an arithmetic number, because the mean of its divisors is an integer number (6329380491).

Almost surely, 2^21700733108 is an apocalyptic number.

It is an amenable number.

21700733108 is a deficient number, since it is larger than the sum of its proper divisors (16275549838).

21700733108 is a wasteful number, since it uses less digits than its factorization.

21700733108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5425183281 (or 5425183279 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The spelling of 21700733108 in words is "twenty-one billion, seven hundred million, seven hundred thirty-three thousand, one hundred eight".