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12203202020 = 2251733526937
BaseRepresentation
bin10110101110101111…
…00001010111100100
31011111110110220010012
423113113201113210
5144443004431040
65334524545352
7611256335312
oct132727412744
934443426105
1012203202020
1151a2431329
1224469b2258
1311c62a03c9
1483a9d50b2
154b650d865
hex2d75e15e4

12203202020 has 24 divisors (see below), whose sum is σ = 25774862904. Its totient is φ = 4853063936.

The previous prime is 12203201971. The next prime is 12203202061. The reversal of 12203202020 is 2020230221.

It can be written as a sum of positive squares in 4 ways, for example, as 6672602596 + 5530599424 = 81686^2 + 74368^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12203201986 and 12203202004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1760009 + ... + 1766928.

It is an arithmetic number, because the mean of its divisors is an integer number (1073952621).

Almost surely, 212203202020 is an apocalyptic number.

12203202020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12203202020 is an abundant number, since it is smaller than the sum of its proper divisors (13571660884).

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

12203202020 is a wasteful number, since it uses less digits than its factorization.

12203202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3527119 (or 3527117 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 12203202020 its reverse (2020230221), we get a palindrome (14223432241).

The spelling of 12203202020 in words is "twelve billion, two hundred three million, two hundred two thousand, twenty".

Divisors: 1 2 4 5 10 20 173 346 692 865 1730 3460 3526937 7053874 14107748 17634685 35269370 70538740 610160101 1220320202 2440640404 3050800505 6101601010 12203202020