21830617097 has 2 divisors, whose sum is σ = 21830617098. Its totient is φ = 21830617096.

The previous prime is 21830617069. The next prime is 21830617111. The reversal of 21830617097 is 79071603812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21716148496 + 114468601 = 147364^2 + 10699^2 .

It is a cyclic number.

It is not a de Polignac number, because 21830617097 - 2²⁶ = 21763508233 is a prime.

It is not a weakly prime, because it can be changed into another prime (21830617037) 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, 10915308548 + 10915308549.

It is an arithmetic number, because the mean of its divisors is an integer number (10915308549).

Almost surely, 2^21830617097 is an apocalyptic number.

It is an amenable number.

21830617097 is a deficient number, since it is larger than the sum of its proper divisors (1).

21830617097 is an equidigital number, since it uses as much as digits as its factorization.

21830617097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The spelling of 21830617097 in words is "twenty-one billion, eight hundred thirty million, six hundred seventeen thousand, ninety-seven".