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20504254189770 = 23251359619479861
BaseRepresentation
bin1001010100110000001001…
…10010011001000011001010
32200121012001201200110011100
410222120010302121003022
510141420203033033040
6111335305131242230
74214245350640011
oct452300462310312
980535051613140
1020504254189770
116595894a4424a
122371a412a9376
13b59709901960
1450c5a8481a78
152585691eeb30
hex12a604c990ca

20504254189770 has 192 divisors, whose sum is σ = 58479438326400. Its totient is φ = 4953629329920.

The previous prime is 20504254189763. The next prime is 20504254189847. The reversal of 20504254189770 is 7798145240502.

20504254189770 is a `hidden beast` number, since 2 + 0 + 5 + 0 + 4 + 2 + 541 + 8 + 97 + 7 + 0 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 42489640 + ... + 42969500.

It is an arithmetic number, because the mean of its divisors is an integer number (304580407950).

Almost surely, 220504254189770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20504254189770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29239719163200).

20504254189770 is an abundant number, since it is smaller than the sum of its proper divisors (37975184136630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20504254189770 is a wasteful number, since it uses less digits than its factorization.

20504254189770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480565 (or 480562 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 54.

The spelling of 20504254189770 in words is "twenty trillion, five hundred four billion, two hundred fifty-four million, one hundred eighty-nine thousand, seven hundred seventy".