21272022868 has 12 divisors (see below), whose sum is σ = 37252210240. Its totient is φ = 10628534232.

The previous prime is 21272022853. The next prime is 21272022883. The reversal of 21272022868 is 86822027212.

It is an interprime number because it is at equal distance from previous prime (21272022853) and next prime (21272022883).

It is a self number, because there is not a number n which added to its sum of digits gives 21272022868.

It is a congruent number.

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, 1862898 + ... + 1874281.

Almost surely, 2^21272022868 is an apocalyptic number.

It is an amenable number.

21272022868 is a deficient number, since it is larger than the sum of its proper divisors (15980187372).

21272022868 is a wasteful number, since it uses less digits than its factorization.

21272022868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3738606 (or 3738604 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The spelling of 21272022868 in words is "twenty-one billion, two hundred seventy-two million, twenty-two thousand, eight hundred sixty-eight".