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20031445134 = 232171973109433
BaseRepresentation
bin10010101001111101…
…111001100010001110
31220201000200211212100
4102221331321202032
5312011022221014
613111411215530
71306253321451
oct225175714216
956630624770
1020031445134
11854a257238
123a705a75a6
131b7306761c
14d8054d498
157c38cd009
hex4a9f7988e

20031445134 has 192 divisors, whose sum is σ = 49599950400. Its totient is φ = 5804752896.

The previous prime is 20031445111. The next prime is 20031445183. The reversal of 20031445134 is 43154413002.

It is a happy number.

20031445134 is a `hidden beast` number, since 2 + 0 + 0 + 3 + 144 + 513 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20031445098 and 20031445107.

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 95 ways as a sum of consecutive naturals, for example, 46261782 + ... + 46262214.

It is an arithmetic number, because the mean of its divisors is an integer number (258333075).

Almost surely, 220031445134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20031445134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24799975200).

20031445134 is an abundant number, since it is smaller than the sum of its proper divisors (29568505266).

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

20031445134 is a wasteful number, since it uses less digits than its factorization.

20031445134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659 (or 656 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 20031445134 its reverse (43154413002), we get a palindrome (63185858136).

The spelling of 20031445134 in words is "twenty billion, thirty-one million, four hundred forty-five thousand, one hundred thirty-four".