21867166627 has 2 divisors, whose sum is σ = 21867166628. Its totient is φ = 21867166626.

The previous prime is 21867166577. The next prime is 21867166631. The reversal of 21867166627 is 72666176812.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21867166627 is a prime.

It is not a weakly prime, because it can be changed into another prime (21867166687) 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 as a sum of consecutive naturals, namely, 10933583313 + 10933583314.

It is an arithmetic number, because the mean of its divisors is an integer number (10933583314).

Almost surely, 2^21867166627 is an apocalyptic number.

21867166627 is a deficient number, since it is larger than the sum of its proper divisors (1).

21867166627 is an equidigital number, since it uses as much as digits as its factorization.

21867166627 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 52.

The spelling of 21867166627 in words is "twenty-one billion, eight hundred sixty-seven million, one hundred sixty-six thousand, six hundred twenty-seven".