Base | Representation |
---|---|
bin | 101000110100… |
… | …0110110110010 |
3 | 1111021021200000 |
4 | 1101220312302 |
5 | 20434313020 |
6 | 2042410430 |
7 | 346622421 |
oct | 121506662 |
9 | 44237600 |
10 | 21401010 |
11 | 11097994 |
12 | 7200a16 |
13 | 4584027 |
14 | 2bb12b8 |
15 | 1d2b090 |
hex | 1468db2 |
21401010 has 48 divisors (see below), whose sum is σ = 57710016. Its totient is φ = 5706288.
The previous prime is 21400997. The next prime is 21401047. The reversal of 21401010 is 1010412.
It is a happy number.
It is a Harshad number since it is a multiple of its sum of digits (9).
It is a junction number, because it is equal to n+sod(n) for n = 21400983 and 21401001.
It is an unprimeable number.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1974 + ... + 6833.
It is an arithmetic number, because the mean of its divisors is an integer number (1202292).
Almost surely, 221401010 is an apocalyptic number.
21401010 is an abundant number, since it is smaller than the sum of its proper divisors (36309006).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21401010 is an equidigital number, since it uses as much as digits as its factorization.
21401010 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 8829 (or 8817 counting only the distinct ones).
The product of its (nonzero) digits is 8, while the sum is 9.
The square root of 21401010 is about 4626.1225664697. The cubic root of 21401010 is about 277.6374775341.
Adding to 21401010 its reverse (1010412), we get a palindrome (22411422).
The spelling of 21401010 in words is "twenty-one million, four hundred one thousand, ten".
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