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BaseRepresentation
bin10011011011000101…
…001100000011101010
31222211110012002202200
4103123011030003222
5320202443031334
613325244241030
71335550211613
oct233305140352
958743162680
1020855439594
1189323964a0
124060540176
131c7499bb02
14101bb62c0a
15820de4799
hex4db14c0ea

20855439594 has 48 divisors (see below), whose sum is σ = 49621201344. Its totient is φ = 6277968000.

The previous prime is 20855439587. The next prime is 20855439607. The reversal of 20855439594 is 49593455802.

20855439594 is a `hidden beast` number, since 2 + 0 + 8 + 5 + 5 + 43 + 9 + 594 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 20855439594.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 318879 + ... + 378674.

It is an arithmetic number, because the mean of its divisors is an integer number (1033775028).

Almost surely, 220855439594 is an apocalyptic number.

20855439594 is an abundant number, since it is smaller than the sum of its proper divisors (28765761750).

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

20855439594 is a wasteful number, since it uses less digits than its factorization.

20855439594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697723 (or 697720 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 54.

The spelling of 20855439594 in words is "twenty billion, eight hundred fifty-five million, four hundred thirty-nine thousand, five hundred ninety-four".