21835097 has 2 divisors, whose sum is σ = 21835098. Its totient is φ = 21835096.

The previous prime is 21835087. The next prime is 21835109. The reversal of 21835097 is 79053812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13097161 + 8737936 = 3619^2 + 2956^2 .

It is a cyclic number.

It is not a de Polignac number, because 21835097 - 2¹² = 21831001 is a prime.

It is not a weakly prime, because it can be changed into another prime (21835007) 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, 10917548 + 10917549.

It is an arithmetic number, because the mean of its divisors is an integer number (10917549).

Almost surely, 2^21835097 is an apocalyptic number.

It is an amenable number.

21835097 is a deficient number, since it is larger than the sum of its proper divisors (1).

21835097 is an equidigital number, since it uses as much as digits as its factorization.

21835097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 21835097 is about 4672.8039762010. The cubic root of 21835097 is about 279.5020785109.

The spelling of 21835097 in words is "twenty-one million, eight hundred thirty-five thousand, ninety-seven".