Base | Representation |
---|---|
bin | 101000110000… |
… | …1110111011011 |
3 | 1111012211101121 |
4 | 1101201313123 |
5 | 20432404004 |
6 | 2042030111 |
7 | 346443100 |
oct | 121416733 |
9 | 44184347 |
10 | 21372379 |
11 | 11078426 |
12 | 71a8337 |
13 | 4573ca2 |
14 | 2ba4aa7 |
15 | 1d22854 |
hex | 1461ddb |
21372379 has 6 divisors (see below), whose sum is σ = 24861804. Its totient is φ = 18319140.
The previous prime is 21372367. The next prime is 21372413. The reversal of 21372379 is 97327312.
It is not a de Polignac number, because 21372379 - 223 = 12983771 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (21372079) by changing a digit.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 218037 + ... + 218134.
It is an arithmetic number, because the mean of its divisors is an integer number (4143634).
Almost surely, 221372379 is an apocalyptic number.
21372379 is a deficient number, since it is larger than the sum of its proper divisors (3489425).
21372379 is an equidigital number, since it uses as much as digits as its factorization.
21372379 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 436185 (or 436178 counting only the distinct ones).
The product of its digits is 15876, while the sum is 34.
The square root of 21372379 is about 4623.0270386404. The cubic root of 21372379 is about 277.5136113227.
The spelling of 21372379 in words is "twenty-one million, three hundred seventy-two thousand, three hundred seventy-nine".
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