21700808626 has 16 divisors (see below), whose sum is σ = 37218295296. Its totient is φ = 9296119296.

The previous prime is 21700808603. The next prime is 21700808629. The reversal of 21700808626 is 62680800712.

It is not an unprimeable number, because it can be changed into a prime (21700808629) 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, 320271 + ... + 382066.

It is an arithmetic number, because the mean of its divisors is an integer number (2326143456).

Almost surely, 2^21700808626 is an apocalyptic number.

21700808626 is a deficient number, since it is larger than the sum of its proper divisors (15517486670).

21700808626 is a wasteful number, since it uses less digits than its factorization.

21700808626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704553.

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 21700808626 in words is "twenty-one billion, seven hundred million, eight hundred eight thousand, six hundred twenty-six".