21326852277 has 12 divisors (see below), whose sum is σ = 30925322220. Its totient is φ = 14162577408.

The previous prime is 21326852251. The next prime is 21326852297. The reversal of 21326852277 is 77225862312.

21326852277 is a `hidden beast` number, since 2 + 1 + 326 + 8 + 52 + 277 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11455634961 + 9871217316 = 107031^2 + 99354^2 .

It is not a de Polignac number, because 21326852277 - 2⁸ = 21326852021 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21326852297) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4607902 + ... + 4612527.

It is an arithmetic number, because the mean of its divisors is an integer number (2577110185).

Almost surely, 2^21326852277 is an apocalyptic number.

It is an amenable number.

21326852277 is a deficient number, since it is larger than the sum of its proper divisors (9598469943).

21326852277 is a wasteful number, since it uses less digits than its factorization.

21326852277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9220692 (or 9220689 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The spelling of 21326852277 in words is "twenty-one billion, three hundred twenty-six million, eight hundred fifty-two thousand, two hundred seventy-seven".