21841168550427 has 12 divisors (see below), whose sum is σ = 31554250429104. Its totient is φ = 14558057869200.

The previous prime is 21841168550303. The next prime is 21841168550429. The reversal of 21841168550427 is 72405586114812.

21841168550427 is a `hidden beast` number, since 2 + 1 + 8 + 4 + 1 + 1 + 68 + 550 + 4 + 27 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-21841168550427 is a prime.

It is a super-2 number, since 2×21841168550427² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21841168550429) 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, 226712868 + ... + 226809185.

It is an arithmetic number, because the mean of its divisors is an integer number (2629520869092).

Almost surely, 2^{21841168550427} is an apocalyptic number.

21841168550427 is a deficient number, since it is larger than the sum of its proper divisors (9713081878677).

21841168550427 is a wasteful number, since it uses less digits than its factorization.

21841168550427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453527410 (or 453527407 counting only the distinct ones).

The product of its (nonzero) digits is 4300800, while the sum is 54.

The spelling of 21841168550427 in words is "twenty-one trillion, eight hundred forty-one billion, one hundred sixty-eight million, five hundred fifty thousand, four hundred twenty-seven".