Base | Representation |
---|---|
bin | 10011000011000001… |
… | …001000010000010010 |
3 | 1221210022112010200202 |
4 | 103003001020100102 |
5 | 313341120103013 |
6 | 13221223215202 |
7 | 1322545525262 |
oct | 230301102022 |
9 | 57708463622 |
10 | 20451722258 |
11 | 8745511700 |
12 | 3b692a7502 |
13 | 1c0c158506 |
14 | dc02b17a2 |
15 | 7ea749858 |
hex | 4c3048412 |
20451722258 has 54 divisors (see below), whose sum is σ = 35033355903. Its totient is φ = 8947363040.
The previous prime is 20451722243. The next prime is 20451722261. The reversal of 20451722258 is 85222715402.
It can be written as a sum of positive squares in 5 ways, for example, as 1384807369 + 19066914889 = 37213^2 + 138083^2 .
It is an ABA number since it can be written as A⋅BA, here for A=2, B=101123.
It is a Duffinian number.
It is an unprimeable number.
It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 64516316 + ... + 64516632.
Almost surely, 220451722258 is an apocalyptic number.
20451722258 is a deficient number, since it is larger than the sum of its proper divisors (14581633645).
20451722258 is an equidigital number, since it uses as much as digits as its factorization.
20451722258 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 716 (or 359 counting only the distinct ones).
The product of its (nonzero) digits is 89600, while the sum is 38.
The spelling of 20451722258 in words is "twenty billion, four hundred fifty-one million, seven hundred twenty-two thousand, two hundred fifty-eight".
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