21484097 has 2 divisors, whose sum is σ = 21484098. Its totient is φ = 21484096.

The previous prime is 21484069. The next prime is 21484121. The reversal of 21484097 is 79048412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10784656 + 10699441 = 3284^2 + 3271^2 .

It is a cyclic number.

It is not a de Polignac number, because 21484097 - 2⁶ = 21484033 is a prime.

It is not a weakly prime, because it can be changed into another prime (21484997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10742048 + 10742049.

It is an arithmetic number, because the mean of its divisors is an integer number (10742049).

Almost surely, 2^21484097 is an apocalyptic number.

It is an amenable number.

21484097 is a deficient number, since it is larger than the sum of its proper divisors (1).

21484097 is an equidigital number, since it uses as much as digits as its factorization.

21484097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 21484097 is about 4635.0940659279. The cubic root of 21484097 is about 277.9963122538.

The spelling of 21484097 in words is "twenty-one million, four hundred eighty-four thousand, ninety-seven".