21850027 has 2 divisors, whose sum is σ = 21850028. Its totient is φ = 21850026.

The previous prime is 21849979. The next prime is 21850039. The reversal of 21850027 is 72005812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21850027 - 2¹⁹ = 21325739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21849983 and 21850010.

It is not a weakly prime, because it can be changed into another prime (21850327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10925013 + 10925014.

It is an arithmetic number, because the mean of its divisors is an integer number (10925014).

Almost surely, 2^21850027 is an apocalyptic number.

21850027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21850027 is an equidigital number, since it uses as much as digits as its factorization.

21850027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 21850027 is about 4674.4012450794. The cubic root of 21850027 is about 279.5657682561.

Adding to 21850027 its reverse (72005812), we get a palindrome (93855839).

The spelling of 21850027 in words is "twenty-one million, eight hundred fifty thousand, twenty-seven".