21456222626 has 8 divisors (see below), whose sum is σ = 32185175580. Its totient is φ = 10727830768.

The previous prime is 21456222577. The next prime is 21456222637. The reversal of 21456222626 is 62622265412.

It can be written as a sum of positive squares in 2 ways, for example, as 21330894601 + 125328025 = 146051^2 + 11195^2 .

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

It is a super-3 number, since 3×21456222626³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21456222626.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26081 + ... + 208788.

Almost surely, 2^21456222626 is an apocalyptic number.

21456222626 is a deficient number, since it is larger than the sum of its proper divisors (10728952954).

21456222626 is a wasteful number, since it uses less digits than its factorization.

21456222626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280548.

The product of its digits is 138240, while the sum is 38.

The spelling of 21456222626 in words is "twenty-one billion, four hundred fifty-six million, two hundred twenty-two thousand, six hundred twenty-six".