21226655762 has 8 divisors (see below), whose sum is σ = 34289213196. Its totient is φ = 9796918032.

The previous prime is 21226655759. The next prime is 21226655777. The reversal of 21226655762 is 26755662212.

21226655762 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 17881305841 + 3345349921 = 133721^2 + 57839^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408204893 + ... + 408204944.

Almost surely, 2^21226655762 is an apocalyptic number.

21226655762 is a deficient number, since it is larger than the sum of its proper divisors (13062557434).

21226655762 is a wasteful number, since it uses less digits than its factorization.

21226655762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816409852.

The product of its digits is 604800, while the sum is 44.

The spelling of 21226655762 in words is "twenty-one billion, two hundred twenty-six million, six hundred fifty-five thousand, seven hundred sixty-two".