Base | Representation |
---|---|
bin | 1000011000101001010000… |
… | …10100101100111000000001 |
3 | 2102021202012121012220010022 |
4 | 10030110220110230320001 |
5 | 4404101003101221212 |
6 | 103114425115343225 |
7 | 3612112615320611 |
oct | 414245024547001 |
9 | 72252177186108 |
10 | 18438971117057 |
11 | 5969a18546707 |
12 | 209971a151b15 |
13 | a39a3122c69a |
14 | 47a645632a41 |
15 | 21e98ec9e772 |
hex | 10c52852ce01 |
18438971117057 has 2 divisors, whose sum is σ = 18438971117058. Its totient is φ = 18438971117056.
The previous prime is 18438971117029. The next prime is 18438971117089. The reversal of 18438971117057 is 75071117983481.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 15612803300416 + 2826167816641 = 3951304^2 + 1681121^2 .
It is a cyclic number.
It is not a de Polignac number, because 18438971117057 - 232 = 18434676149761 is a prime.
It is not a weakly prime, because it can be changed into another prime (18438971117027) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9219485558528 + 9219485558529.
It is an arithmetic number, because the mean of its divisors is an integer number (9219485558529).
Almost surely, 218438971117057 is an apocalyptic number.
It is an amenable number.
18438971117057 is a deficient number, since it is larger than the sum of its proper divisors (1).
18438971117057 is an equidigital number, since it uses as much as digits as its factorization.
18438971117057 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 11854080, while the sum is 62.
The spelling of 18438971117057 in words is "eighteen trillion, four hundred thirty-eight billion, nine hundred seventy-one million, one hundred seventeen thousand, fifty-seven".
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