21827054277 has 48 divisors (see below), whose sum is σ = 36192199680. Its totient is φ = 12417292800.

The previous prime is 21827054269. The next prime is 21827054281. The reversal of 21827054277 is 77245072812.

21827054277 is a `hidden beast` number, since 2 + 18 + 27 + 0 + 542 + 77 = 666.

It is not a de Polignac number, because 21827054277 - 2³ = 21827054269 is a prime.

It is a super-2 number, since 2×21827054277² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21827054287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24774877 + ... + 24775757.

It is an arithmetic number, because the mean of its divisors is an integer number (754004160).

Almost surely, 2^21827054277 is an apocalyptic number.

It is an amenable number.

21827054277 is a deficient number, since it is larger than the sum of its proper divisors (14365145403).

21827054277 is a wasteful number, since it uses less digits than its factorization.

21827054277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2194 (or 2191 counting only the distinct ones).

The product of its (nonzero) digits is 439040, while the sum is 45.

The spelling of 21827054277 in words is "twenty-one billion, eight hundred twenty-seven million, fifty-four thousand, two hundred seventy-seven".