21960318481249 has 2 divisors, whose sum is σ = 21960318481250. Its totient is φ = 21960318481248.

The previous prime is 21960318481177. The next prime is 21960318481333. The reversal of 21960318481249 is 94218481306912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18917149878225 + 3043168603024 = 4349385^2 + 1744468^2 .

It is a cyclic number.

It is not a de Polignac number, because 21960318481249 - 2⁷ = 21960318481121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21960318481193 and 21960318481202.

It is not a weakly prime, because it can be changed into another prime (21960318481349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10980159240624 + 10980159240625.

It is an arithmetic number, because the mean of its divisors is an integer number (10980159240625).

Almost surely, 2^{21960318481249} is an apocalyptic number.

It is an amenable number.

21960318481249 is a deficient number, since it is larger than the sum of its proper divisors (1).

21960318481249 is an equidigital number, since it uses as much as digits as its factorization.

21960318481249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5971968, while the sum is 58.

The spelling of 21960318481249 in words is "twenty-one trillion, nine hundred sixty billion, three hundred eighteen million, four hundred eighty-one thousand, two hundred forty-nine".