21714073 has 2 divisors, whose sum is σ = 21714074. Its totient is φ = 21714072.

The previous prime is 21714071. The next prime is 21714103. The reversal of 21714073 is 37041712.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11235904 + 10478169 = 3352^2 + 3237^2 .

It is a cyclic number.

It is not a de Polignac number, because 21714073 - 2¹ = 21714071 is a prime.

Together with 21714071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21714071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10857036 + 10857037.

It is an arithmetic number, because the mean of its divisors is an integer number (10857037).

Almost surely, 2^21714073 is an apocalyptic number.

It is an amenable number.

21714073 is a deficient number, since it is larger than the sum of its proper divisors (1).

21714073 is an equidigital number, since it uses as much as digits as its factorization.

21714073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 21714073 is about 4659.8361559179. The cubic root of 21714073 is about 278.9847287197.

Adding to 21714073 its reverse (37041712), we get a palindrome (58755785).

The spelling of 21714073 in words is "twenty-one million, seven hundred fourteen thousand, seventy-three".