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20434404033 = 341657152249
BaseRepresentation
bin10011000001111111…
…000100001011000001
31221202002221021120000
4103001333010023001
5313322201412113
613215404110213
71322245365651
oct230177041301
957662837500
1020434404033
11873676321a
123b63535369
131c086a3944
14dbbc84361
157e8e78373
hex4c1fc42c1

20434404033 has 20 divisors (see below), whose sum is σ = 30544090500. Its totient is φ = 13614625152.

The previous prime is 20434404017. The next prime is 20434404043. The reversal of 20434404033 is 33040443402.

It can be written as a sum of positive squares in 2 ways, for example, as 5258135169 + 15176268864 = 72513^2 + 123192^2 .

It is not a de Polignac number, because 20434404033 - 24 = 20434404017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20434403988 and 20434404006.

It is not an unprimeable number, because it can be changed into a prime (20434404043) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 58093 + ... + 210341.

It is an arithmetic number, because the mean of its divisors is an integer number (1527204525).

Almost surely, 220434404033 is an apocalyptic number.

It is an amenable number.

20434404033 is a deficient number, since it is larger than the sum of its proper divisors (10109686467).

20434404033 is a wasteful number, since it uses less digits than its factorization.

20434404033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153918 (or 153909 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 27.

Adding to 20434404033 its reverse (33040443402), we get a palindrome (53474847435).

The spelling of 20434404033 in words is "twenty billion, four hundred thirty-four million, four hundred four thousand, thirty-three".

Divisors: 1 3 9 27 81 1657 4971 14913 44739 134217 152249 456747 1370241 4110723 12332169 252276593 756829779 2270489337 6811468011 20434404033