21223274627 has 6 divisors (see below), whose sum is σ = 21423488268. Its totient is φ = 21024914924.

The previous prime is 21223274617. The next prime is 21223274647. The reversal of 21223274627 is 72647232212.

It is a de Polignac number, because none of the positive numbers 2^k-21223274627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21223274617) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 915413 + ... + 938310.

It is an arithmetic number, because the mean of its divisors is an integer number (3570581378).

Almost surely, 2^21223274627 is an apocalyptic number.

21223274627 is a deficient number, since it is larger than the sum of its proper divisors (200213641).

21223274627 is an equidigital number, since it uses as much as digits as its factorization.

21223274627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853937 (or 1853830 counting only the distinct ones).

The product of its digits is 112896, while the sum is 38.

The spelling of 21223274627 in words is "twenty-one billion, two hundred twenty-three million, two hundred seventy-four thousand, six hundred twenty-seven".