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20922789887947 is a prime number
BaseRepresentation
bin1001100000111011101110…
…11101010111111111001011
32202002012101012102211221001
410300131313131113333023
510220244333202403242
6112255444051555431
74256423144450263
oct460356735277713
982065335384831
1020922789887947
11673733a487a72
12241ab87bbbb77
13b8a01a44412c
1452495027a7a3
152643b301beb7
hex130777757fcb

20922789887947 has 2 divisors, whose sum is σ = 20922789887948. Its totient is φ = 20922789887946.

The previous prime is 20922789887929. The next prime is 20922789888023. The reversal of 20922789887947 is 74978898722902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20922789887947 - 27 = 20922789887819 is a prime.

It is not a weakly prime, because it can be changed into another prime (20922789887647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10461394943973 + 10461394943974.

It is an arithmetic number, because the mean of its divisors is an integer number (10461394943974).

Almost surely, 220922789887947 is an apocalyptic number.

20922789887947 is a deficient number, since it is larger than the sum of its proper divisors (1).

20922789887947 is an equidigital number, since it uses as much as digits as its factorization.

20922789887947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4096770048, while the sum is 82.

The spelling of 20922789887947 in words is "twenty trillion, nine hundred twenty-two billion, seven hundred eighty-nine million, eight hundred eighty-seven thousand, nine hundred forty-seven".