21106751336 has 128 divisors (see below), whose sum is σ = 46502501760. Its totient is φ = 8875008000.

The previous prime is 21106751329. The next prime is 21106751381. The reversal of 21106751336 is 63315760112.

It is a junction number, because it is equal to n+sod(n) for n = 21106751296 and 21106751305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24628220 + ... + 24629076.

It is an arithmetic number, because the mean of its divisors is an integer number (363300795).

Almost surely, 2^21106751336 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21106751336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23251250880).

21106751336 is an abundant number, since it is smaller than the sum of its proper divisors (25395750424).

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

21106751336 is a wasteful number, since it uses less digits than its factorization.

21106751336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155 (or 1151 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

The spelling of 21106751336 in words is "twenty-one billion, one hundred six million, seven hundred fifty-one thousand, three hundred thirty-six".