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20910805934 = 279132346873
BaseRepresentation
bin10011011110011000…
…011001001110101110
31222222022101000002212
4103132120121032232
5320311131242214
613334543050422
71340121626534
oct233630311656
958868330085
1020910805934
118960671aa7
124076ba0a12
131c832b5965
141025256154
15825bce53e
hex4de6193ae

20910805934 has 8 divisors (see below), whose sum is σ = 31763249760. Its totient is φ = 10323056016.

The previous prime is 20910805921. The next prime is 20910806011. The reversal of 20910805934 is 43950801902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×209108059342 (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20910805891 and 20910805900.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 66173279 + ... + 66173594.

It is an arithmetic number, because the mean of its divisors is an integer number (3970406220).

Almost surely, 220910805934 is an apocalyptic number.

20910805934 is a deficient number, since it is larger than the sum of its proper divisors (10852443826).

20910805934 is a wasteful number, since it uses less digits than its factorization.

20910805934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132346954.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 20910805934 in words is "twenty billion, nine hundred ten million, eight hundred five thousand, nine hundred thirty-four".

Divisors: 1 2 79 158 132346873 264693746 10455402967 20910805934