21934127 has 2 divisors, whose sum is σ = 21934128. Its totient is φ = 21934126.

The previous prime is 21934093. The next prime is 21934169. The reversal of 21934127 is 72143912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21934127 - 2¹⁸ = 21671983 is a prime.

It is a super-2 number, since 2×21934127² = 962211854504258, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21934127.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21934427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10967063 + 10967064.

It is an arithmetic number, because the mean of its divisors is an integer number (10967064).

Almost surely, 2^21934127 is an apocalyptic number.

21934127 is a deficient number, since it is larger than the sum of its proper divisors (1).

21934127 is an equidigital number, since it uses as much as digits as its factorization.

21934127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 29.

The square root of 21934127 is about 4683.3884101151. The cubic root of 21934127 is about 279.9239887209.

The spelling of 21934127 in words is "twenty-one million, nine hundred thirty-four thousand, one hundred twenty-seven".