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30205145012 = 22717101962273
BaseRepresentation
bin11100001000010111…
…011110111110110100
32212222001022100102112
4130020113132332310
5443330004120022
621513121030152
72116340332160
oct341027367664
985861270375
1030205145012
11118a0020569
125a2b785358
132b04a31193
1416677a9ca0
15bbbb4c8e2
hex7085defb4

30205145012 has 48 divisors (see below), whose sum is σ = 64027635840. Its totient is φ = 12171436032.

The previous prime is 30205145011. The next prime is 30205145017. The reversal of 30205145012 is 21054150203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30205145011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 453908 + ... + 516180.

It is an arithmetic number, because the mean of its divisors is an integer number (1333909080).

Almost surely, 230205145012 is an apocalyptic number.

It is an amenable number.

30205145012 is an abundant number, since it is smaller than the sum of its proper divisors (33822490828).

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

30205145012 is a wasteful number, since it uses less digits than its factorization.

30205145012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63320 (or 63318 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 30205145012 its reverse (21054150203), we get a palindrome (51259295215).

The spelling of 30205145012 in words is "thirty billion, two hundred five million, one hundred forty-five thousand, twelve".

Divisors: 1 2 4 7 14 17 28 34 68 119 238 476 1019 2038 4076 7133 14266 17323 28532 34646 62273 69292 121261 124546 242522 249092 435911 485044 871822 1058641 1743644 2117282 4234564 7410487 14820974 29641948 63456187 126912374 253824748 444193309 888386618 1078755179 1776773236 2157510358 4315020716 7551286253 15102572506 30205145012