21312634227 has 8 divisors (see below), whose sum is σ = 29109939600. Its totient is φ = 13861875840.

The previous prime is 21312634219. The next prime is 21312634253. The reversal of 21312634227 is 72243621312.

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

It is not a de Polignac number, because 21312634227 - 2³ = 21312634219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21312634027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86636602 + ... + 86636847.

It is an arithmetic number, because the mean of its divisors is an integer number (3638742450).

Almost surely, 2^21312634227 is an apocalyptic number.

21312634227 is a deficient number, since it is larger than the sum of its proper divisors (7797305373).

21312634227 is a wasteful number, since it uses less digits than its factorization.

21312634227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173273493.

The product of its digits is 24192, while the sum is 33.

The spelling of 21312634227 in words is "twenty-one billion, three hundred twelve million, six hundred thirty-four thousand, two hundred twenty-seven".