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207407929922 = 21721929972
BaseRepresentation
bin1100000100101001111…
…0011101101001000010
3201211100121121111221022
43001022132131221002
511344232412224142
6235140515425442
720661522213224
oct3011236355102
9654317544838
10207407929922
117aa63407636
12342445b5282
1316734cb1c6b
14a077ca8414
1555dd9bb6d2
hex304a79da42

207407929922 has 54 divisors (see below), whose sum is σ = 349148951307. Its totient is φ = 92373948288.

The previous prime is 207407929921. The next prime is 207407929951. The reversal of 207407929922 is 229929704702.

It can be written as a sum of positive squares in 5 ways, for example, as 205844597401 + 1563332521 = 453701^2 + 39539^2 .

It is an ABA number since it can be written as A⋅BA, here for A=2, B=322031.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (207407929921) by changing a digit.

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 26 ways as a sum of consecutive naturals, for example, 208031528 + ... + 208032524.

Almost surely, 2207407929922 is an apocalyptic number.

207407929922 is a deficient number, since it is larger than the sum of its proper divisors (141741021385).

207407929922 is an frugal number, since it uses more digits than its factorization.

207407929922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068 (or 1035 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 53.

The spelling of 207407929922 in words is "two hundred seven billion, four hundred seven million, nine hundred twenty-nine thousand, nine hundred twenty-two".

Divisors: 1 2 17 19 34 38 289 323 361 578 646 722 997 1994 5491 6137 10982 12274 16949 18943 33898 37886 104329 208658 288133 322031 359917 576266 644062 719834 994009 1988018 5474527 6118589 10949054 12237178 16898153 18886171 33796306 37772342 104016013 208032026 287268601 321064907 358837249 574537202 642129814 717674498 5458103419 6100233233 10916206838 12200466466 103703964961 207407929922