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BaseRepresentation
bin10100010010011001…
…011001100111101010
32002020010110200121021
4110102121121213222
5324103033004111
614001315403054
71400546365231
oct242231314752
962203420537
1021783484906
119269233697
12427b2b348a
132092034851
1410a90ddb18
15877610d71
hex5126599ea

21783484906 has 16 divisors (see below), whose sum is σ = 32789514240. Its totient is φ = 10853670960.

The previous prime is 21783484903. The next prime is 21783484907. The reversal of 21783484906 is 60948438712.

It is not an unprimeable number, because it can be changed into a prime (21783484903) 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 7 ways as a sum of consecutive naturals, for example, 3470551 + ... + 3476821.

It is an arithmetic number, because the mean of its divisors is an integer number (2049344640).

Almost surely, 221783484906 is an apocalyptic number.

21783484906 is a deficient number, since it is larger than the sum of its proper divisors (11006029334).

21783484906 is a wasteful number, since it uses less digits than its factorization.

21783484906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12069.

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 21783484906 in words is "twenty-one billion, seven hundred eighty-three million, four hundred eighty-four thousand, nine hundred six".