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20523523212 = 2232836868649
BaseRepresentation
bin10011000111010011…
…000001110010001100
31221222022122000002100
4103013103001302030
5314013010220322
613232310155100
71324410032433
oct230723016214
957868560070
1020523523212
118781aa2835
123b89352a90
131c20ca799a
14dc9a4211a
15801bcddac
hex4c74c1c8c

20523523212 has 36 divisors (see below), whose sum is σ = 52503960600. Its totient is φ = 6758749632.

The previous prime is 20523523121. The next prime is 20523523291. The reversal of 20523523212 is 21232532502.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3431337 + ... + 3437312.

It is an arithmetic number, because the mean of its divisors is an integer number (1458443350).

Almost surely, 220523523212 is an apocalyptic number.

It is an amenable number.

20523523212 is an abundant number, since it is smaller than the sum of its proper divisors (31980437388).

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

20523523212 is a wasteful number, since it uses less digits than its factorization.

20523523212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6868742 (or 6868737 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The spelling of 20523523212 in words is "twenty billion, five hundred twenty-three million, five hundred twenty-three thousand, two hundred twelve".

Divisors: 1 2 3 4 6 9 12 18 36 83 166 249 332 498 747 996 1494 2988 6868649 13737298 20605947 27474596 41211894 61817841 82423788 123635682 247271364 570097867 1140195734 1710293601 2280391468 3420587202 5130880803 6841174404 10261761606 20523523212