21933127 has 2 divisors, whose sum is σ = 21933128. Its totient is φ = 21933126.

The previous prime is 21933091. The next prime is 21933143. The reversal of 21933127 is 72133912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21933127 - 2¹¹ = 21931079 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21933095 and 21933104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21933157) 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, 10966563 + 10966564.

It is an arithmetic number, because the mean of its divisors is an integer number (10966564).

Almost surely, 2^21933127 is an apocalyptic number.

21933127 is a deficient number, since it is larger than the sum of its proper divisors (1).

21933127 is an equidigital number, since it uses as much as digits as its factorization.

21933127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 28.

The square root of 21933127 is about 4683.2816485879. The cubic root of 21933127 is about 279.9197346462.

The spelling of 21933127 in words is "twenty-one million, nine hundred thirty-three thousand, one hundred twenty-seven".