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320312100020 = 225111976629689
BaseRepresentation
bin1001010100101000001…
…01101100010010110100
31010121210002201121201212
410222110011230102310
520221444344200040
6403052131540552
732066426633003
oct4522405542264
91117702647655
10320312100020
11113930914720
12520b3a5a758
132428907c9c3
1411708a6ac3a
1584eaa28d65
hex4a9416c4b4

320312100020 has 48 divisors (see below), whose sum is σ = 772427275200. Its totient is φ = 110346750720.

The previous prime is 320312099903. The next prime is 320312100047. The reversal of 320312100020 is 20001213023.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 320312099968 and 320312100004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38310665 + ... + 38319024.

It is an arithmetic number, because the mean of its divisors is an integer number (16092234900).

Almost surely, 2320312100020 is an apocalyptic number.

It is an amenable number.

320312100020 is an abundant number, since it is smaller than the sum of its proper divisors (452115175180).

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

320312100020 is a wasteful number, since it uses less digits than its factorization.

320312100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76629728 (or 76629726 counting only the distinct ones).

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

Adding to 320312100020 its reverse (20001213023), we get a palindrome (340313313043).

The spelling of 320312100020 in words is "three hundred twenty billion, three hundred twelve million, one hundred thousand, twenty".

Divisors: 1 2 4 5 10 11 19 20 22 38 44 55 76 95 110 190 209 220 380 418 836 1045 2090 4180 76629689 153259378 306518756 383148445 766296890 842926579 1455964091 1532593780 1685853158 2911928182 3371706316 4214632895 5823856364 7279820455 8429265790 14559640910 16015605001 16858531580 29119281820 32031210002 64062420004 80078025005 160156050010 320312100020