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20040121034831 is a prime number
BaseRepresentation
bin1001000111001111101000…
…10010111010100001001111
32121221211001111021020201202
410203213310102322201033
510111314131441103311
6110342145435100115
74135564611133622
oct443476422724117
977854044236652
1020040121034831
116426a70974367
1222b7aabba163b
13b24a10463231
144d3d38933db9
1524b4522c9e3b
hex1239f44ba84f

20040121034831 has 2 divisors, whose sum is σ = 20040121034832. Its totient is φ = 20040121034830.

The previous prime is 20040121034809. The next prime is 20040121034893. The reversal of 20040121034831 is 13843012104002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-20040121034831 is a prime.

It is a super-2 number, since 2×200401210348312 (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20040121034794 and 20040121034803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20040121031831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10020060517415 + 10020060517416.

It is an arithmetic number, because the mean of its divisors is an integer number (10020060517416).

Almost surely, 220040121034831 is an apocalyptic number.

20040121034831 is a deficient number, since it is larger than the sum of its proper divisors (1).

20040121034831 is an equidigital number, since it uses as much as digits as its factorization.

20040121034831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 20040121034831 its reverse (13843012104002), we get a palindrome (33883133138833).

The spelling of 20040121034831 in words is "twenty trillion, forty billion, one hundred twenty-one million, thirty-four thousand, eight hundred thirty-one".