21227026770 has 96 divisors (see below), whose sum is σ = 55533973248. Its totient is φ = 5625414144.

The previous prime is 21227026759. The next prime is 21227026871. The reversal of 21227026770 is 7762072212.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11130157 + ... + 11132063.

It is an arithmetic number, because the mean of its divisors is an integer number (578478888).

Almost surely, 2^21227026770 is an apocalyptic number.

21227026770 is an abundant number, since it is smaller than the sum of its proper divisors (34306946478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21227026770 is a wasteful number, since it uses less digits than its factorization.

21227026770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2624 (or 2621 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

Adding to 21227026770 its reverse (7762072212), we get a palindrome (28989098982).

The spelling of 21227026770 in words is "twenty-one billion, two hundred twenty-seven million, twenty-six thousand, seven hundred seventy".