21227426284 has 12 divisors (see below), whose sum is σ = 37154785024. Its totient is φ = 10611773424.

The previous prime is 21227426273. The next prime is 21227426291. The reversal of 21227426284 is 48262472212.

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, 460167 + ... + 504190.

Almost surely, 2^21227426284 is an apocalyptic number.

It is an amenable number.

21227426284 is a deficient number, since it is larger than the sum of its proper divisors (15927358740).

21227426284 is a wasteful number, since it uses less digits than its factorization.

21227426284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969864 (or 969862 counting only the distinct ones).

The product of its digits is 172032, while the sum is 40.

Adding to 21227426284 its reverse (48262472212), we get a palindrome (69489898496).

The spelling of 21227426284 in words is "twenty-one billion, two hundred twenty-seven million, four hundred twenty-six thousand, two hundred eighty-four".