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20131230300031 = 181251443116601
BaseRepresentation
bin1001001001111001010101…
…10101001011011101111111
32122021112020001102110122101
410210330222311023131333
510114312224424100111
6110452054242525531
74145301440122534
oct444745265133577
978245201373571
1020131230300031
116461674758854
1223116983668a7
13b304a002b446
144d84dcca2d8b
1524d9d5c1cbc1
hex124f2ad4b77f

20131230300031 has 8 divisors (see below), whose sum is σ = 20323099834128. Its totient is φ = 19940247000000.

The previous prime is 20131230299977. The next prime is 20131230300091. The reversal of 20131230300031 is 13000303213102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20131230300031 - 239 = 19581474486143 is a prime.

It is a super-2 number, since 2×201312303000312 (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20131230299981 and 20131230300008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131230300091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221512870 + ... + 221603731.

It is an arithmetic number, because the mean of its divisors is an integer number (2540387479266).

Almost surely, 220131230300031 is an apocalyptic number.

20131230300031 is a deficient number, since it is larger than the sum of its proper divisors (191869534097).

20131230300031 is a wasteful number, since it uses less digits than its factorization.

20131230300031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443117033.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 20131230300031 its reverse (13000303213102), we get a palindrome (33131533513133).

The spelling of 20131230300031 in words is "twenty trillion, one hundred thirty-one billion, two hundred thirty million, three hundred thousand, thirty-one".

Divisors: 1 181 251 45431 443116601 80204104781 111222266851 20131230300031