21457983024097 has 2 divisors, whose sum is σ = 21457983024098. Its totient is φ = 21457983024096.

The previous prime is 21457983024083. The next prime is 21457983024187. The reversal of 21457983024097 is 79042038975412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14370892482816 + 7087090541281 = 3790896^2 + 2662159^2 .

It is a cyclic number.

It is not a de Polignac number, because 21457983024097 - 2³¹ = 21455835540449 is a prime.

It is not a weakly prime, because it can be changed into another prime (21457983027097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10728991512048 + 10728991512049.

It is an arithmetic number, because the mean of its divisors is an integer number (10728991512049).

Almost surely, 2^{21457983024097} is an apocalyptic number.

It is an amenable number.

21457983024097 is a deficient number, since it is larger than the sum of its proper divisors (1).

21457983024097 is an equidigital number, since it uses as much as digits as its factorization.

21457983024097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30481920, while the sum is 61.

The spelling of 21457983024097 in words is "twenty-one trillion, four hundred fifty-seven billion, nine hundred eighty-three million, twenty-four thousand, ninety-seven".