21226765267 has 16 divisors (see below), whose sum is σ = 23267347200. Its totient is φ = 19275182080.

The previous prime is 21226765247. The next prime is 21226765279. The reversal of 21226765267 is 76256762212.

It is not a de Polignac number, because 21226765267 - 2¹¹ = 21226763219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21226765247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 694467 + ... + 724387.

It is an arithmetic number, because the mean of its divisors is an integer number (1454209200).

Almost surely, 2^21226765267 is an apocalyptic number.

21226765267 is a deficient number, since it is larger than the sum of its proper divisors (2040581933).

21226765267 is a wasteful number, since it uses less digits than its factorization.

21226765267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31406.

The product of its digits is 846720, while the sum is 46.

The spelling of 21226765267 in words is "twenty-one billion, two hundred twenty-six million, seven hundred sixty-five thousand, two hundred sixty-seven".