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20854482217 is a prime number
BaseRepresentation
bin10011011011000001…
…100010010100101001
31222211101101110111021
4103123001202110221
5320202221412332
613325211532441
71335536113462
oct233301422451
958741343437
1020854482217
1189318a2178
12406015a121
131c7472510a
14101b993d69
15820ca5c97
hex4db062529

20854482217 has 2 divisors, whose sum is σ = 20854482218. Its totient is φ = 20854482216.

The previous prime is 20854482211. The next prime is 20854482227. The reversal of 20854482217 is 71228445802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16400388096 + 4454094121 = 128064^2 + 66739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-20854482217 is a prime.

It is not a weakly prime, because it can be changed into another prime (20854482211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10427241108 + 10427241109.

It is an arithmetic number, because the mean of its divisors is an integer number (10427241109).

Almost surely, 220854482217 is an apocalyptic number.

It is an amenable number.

20854482217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20854482217 is an equidigital number, since it uses as much as digits as its factorization.

20854482217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 286720, while the sum is 43.

The spelling of 20854482217 in words is "twenty billion, eight hundred fifty-four million, four hundred eighty-two thousand, two hundred seventeen".