21966522027 has 8 divisors (see below), whose sum is σ = 29297523264. Its totient is φ = 14639934408.

The previous prime is 21966521999. The next prime is 21966522037. The reversal of 21966522027 is 72022566912.

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

It is not a de Polignac number, because 21966522027 - 2¹¹ = 21966519979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21966522027.

It is not an unprimeable number, because it can be changed into a prime (21966522037) 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, 1091773 + ... + 1111710.

It is an arithmetic number, because the mean of its divisors is an integer number (3662190408).

Almost surely, 2^21966522027 is an apocalyptic number.

21966522027 is a deficient number, since it is larger than the sum of its proper divisors (7331001237).

21966522027 is a wasteful number, since it uses less digits than its factorization.

21966522027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2206809.

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 21966522027 in words is "twenty-one billion, nine hundred sixty-six million, five hundred twenty-two thousand, twenty-seven".