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BaseRepresentation
bin1001010101000000001101…
…11001100110111011010011
32200122000022211212012100012
410222200012321212323103
510142040334132230033
6111343253051145135
74215002164316015
oct452400671467323
980560284765305
1020512879570643
116599510825599
122373649a451ab
13b5a482889015
1450cb85c1c1b5
152588c157d248
hex12a806e66ed3

20512879570643 has 2 divisors, whose sum is σ = 20512879570644. Its totient is φ = 20512879570642.

The previous prime is 20512879570639. The next prime is 20512879570691. The reversal of 20512879570643 is 34607597821502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20512879570643 - 22 = 20512879570639 is a prime.

It is not a weakly prime, because it can be changed into another prime (20512879570613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10256439785321 + 10256439785322.

It is an arithmetic number, because the mean of its divisors is an integer number (10256439785322).

It is a 1-persistent number, because it is pandigital, but 2⋅20512879570643 = 41025759141286 is not.

Almost surely, 220512879570643 is an apocalyptic number.

20512879570643 is a deficient number, since it is larger than the sum of its proper divisors (1).

20512879570643 is an equidigital number, since it uses as much as digits as its factorization.

20512879570643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25401600, while the sum is 59.

The spelling of 20512879570643 in words is "twenty trillion, five hundred twelve billion, eight hundred seventy-nine million, five hundred seventy thousand, six hundred forty-three".