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20075861442 = 23721317595237
BaseRepresentation
bin10010101100100111…
…010101010111000010
31220211010021102120210
4102230213111113002
5312103410031232
613120035214550
71310333002200
oct225447252702
956733242523
1020075861442
11857233392a
123a83447456
131b7c319370
14d863d2070
157c77535cc
hex4ac9d55c2

20075861442 has 192 divisors, whose sum is σ = 54171815040. Its totient is φ = 4897880064.

The previous prime is 20075861401. The next prime is 20075861447. The reversal of 20075861442 is 24416857002.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 20075861442.

It is not an unprimeable number, because it can be changed into a prime (20075861447) 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 95 ways as a sum of consecutive naturals, for example, 3830848 + ... + 3836084.

It is an arithmetic number, because the mean of its divisors is an integer number (282144870).

Almost surely, 220075861442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20075861442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27085907520).

20075861442 is an abundant number, since it is smaller than the sum of its proper divisors (34095953598).

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

20075861442 is a wasteful number, since it uses less digits than its factorization.

20075861442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5345 (or 5338 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The spelling of 20075861442 in words is "twenty billion, seventy-five million, eight hundred sixty-one thousand, four hundred forty-two".