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BaseRepresentation
bin1001100111100010111111…
…00111000100110100001001
32202212220220110201012221012
410303301133213010310021
510233010221344404421
6112552104135053305
74312016200430621
oct463613747046411
982786813635835
1021150023044361
1168147466a0702
122457023b11235
13ba5591839a33
14531949133881
1526a26222e95b
hex133c5f9c4d09

21150023044361 has 4 divisors (see below), whose sum is σ = 21150342110724. Its totient is φ = 21149703978000.

The previous prime is 21150023044351. The next prime is 21150023044399. The reversal of 21150023044361 is 16344032005112.

Adding to 21150023044361 its reverse (16344032005112), we get a palindrome (37494055049473).

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1096921075600 + 20053101968761 = 1047340^2 + 4478069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-21150023044361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21150023044351) 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 in 3 ways as a sum of consecutive naturals, for example, 159433730 + ... + 159566331.

It is an arithmetic number, because the mean of its divisors is an integer number (5287585527681).

Almost surely, 221150023044361 is an apocalyptic number.

It is an amenable number.

21150023044361 is a deficient number, since it is larger than the sum of its proper divisors (319066363).

21150023044361 is an equidigital number, since it uses as much as digits as its factorization.

21150023044361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319066362.

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 21150023044361 in words is "twenty-one trillion, one hundred fifty billion, twenty-three million, forty-four thousand, three hundred sixty-one".

Divisors: 1 66301 319000061 21150023044361