21106755226 has 48 divisors (see below), whose sum is σ = 34085357280. Its totient is φ = 9798190560.

The previous prime is 21106755223. The next prime is 21106755247. The reversal of 21106755226 is 62255760112.

It is a super-2 number, since 2×21106755226² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21106755223) 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 23 ways as a sum of consecutive naturals, for example, 19892736 + ... + 19893796.

It is an arithmetic number, because the mean of its divisors is an integer number (710111610).

Almost surely, 2^21106755226 is an apocalyptic number.

21106755226 is a deficient number, since it is larger than the sum of its proper divisors (12978602054).

21106755226 is a wasteful number, since it uses less digits than its factorization.

21106755226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627 (or 1608 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 21106755226 in words is "twenty-one billion, one hundred six million, seven hundred fifty-five thousand, two hundred twenty-six".