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30211302020 = 2254732139683
BaseRepresentation
bin11100001000101110…
…111110001010000100
32212222110220011020212
4130020232332022010
5443333043131040
621513501014552
72116443554504
oct341056761204
985873804225
1030211302020
11118a35463a9
125a31854458
132b060a8793
14166852da04
15bbc466d65
hex708bbe284

30211302020 has 24 divisors (see below), whose sum is σ = 64793602944. Its totient is φ = 11827402976.

The previous prime is 30211301977. The next prime is 30211302029. The reversal of 30211302020 is 2020311203.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 30211301986 and 30211302004.

It is not an unprimeable number, because it can be changed into a prime (30211302029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16068902 + ... + 16070781.

It is an arithmetic number, because the mean of its divisors is an integer number (2699733456).

Almost surely, 230211302020 is an apocalyptic number.

It is an amenable number.

30211302020 is an abundant number, since it is smaller than the sum of its proper divisors (34582300924).

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

30211302020 is a wasteful number, since it uses less digits than its factorization.

30211302020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32139739 (or 32139737 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 30211302020 its reverse (2020311203), we get a palindrome (32231613223).

The spelling of 30211302020 in words is "thirty billion, two hundred eleven million, three hundred two thousand, twenty".

Divisors: 1 2 4 5 10 20 47 94 188 235 470 940 32139683 64279366 128558732 160698415 321396830 642793660 1510565101 3021130202 6042260404 7552825505 15105651010 30211302020