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12450310220 = 225622515511
BaseRepresentation
bin10111001100001100…
…01010100001001100
31012010200110021211202
423212012022201030
5200444234411340
65415233205032
7620346614345
oct134606124114
935120407752
1012450310220
11530996a387
1224b5700778
13123553c78a
1486175b0cc
154cd070c15
hex2e618a84c

12450310220 has 12 divisors (see below), whose sum is σ = 26145651504. Its totient is φ = 4980124080.

The previous prime is 12450310219. The next prime is 12450310261. The reversal of 12450310220 is 2201305421.

It is a super-3 number, since 3×124503102203 (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 622515511 = 12450310220 / (1 + 2 + 4 + 5 + 0 + 3 + 1 + 0 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 12450310192 and 12450310201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311257736 + ... + 311257775.

It is an arithmetic number, because the mean of its divisors is an integer number (2178804292).

Almost surely, 212450310220 is an apocalyptic number.

12450310220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12450310220 is an abundant number, since it is smaller than the sum of its proper divisors (13695341284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12450310220 is a wasteful number, since it uses less digits than its factorization.

12450310220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622515520 (or 622515518 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 12450310220 its reverse (2201305421), we get a palindrome (14651615641).

The spelling of 12450310220 in words is "twelve billion, four hundred fifty million, three hundred ten thousand, two hundred twenty".

Divisors: 1 2 4 5 10 20 622515511 1245031022 2490062044 3112577555 6225155110 12450310220