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13203120030 = 2351031426871
BaseRepresentation
bin11000100101111011…
…11001111110011110
31021002010222222202120
430102331321332132
5204014444320110
610022044403410
7645120445212
oct142275717636
937063888676
1013203120030
1156658a9551
122685846566
1313254ac179
148d3720942
155241c5870
hex312f79f9e

13203120030 has 32 divisors (see below), whose sum is σ = 31718297088. Its totient is φ = 3517408800.

The previous prime is 13203120011. The next prime is 13203120037. The reversal of 13203120030 is 3002130231.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 13203119991 and 13203120009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13203120037) 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, 182506 + ... + 244365.

It is an arithmetic number, because the mean of its divisors is an integer number (991196784).

Almost surely, 213203120030 is an apocalyptic number.

13203120030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13203120030 is an abundant number, since it is smaller than the sum of its proper divisors (18515177058).

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

13203120030 is a wasteful number, since it uses less digits than its factorization.

13203120030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427912.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 13203120030 its reverse (3002130231), we get a palindrome (16205250261).

The spelling of 13203120030 in words is "thirteen billion, two hundred three million, one hundred twenty thousand, thirty".

Divisors: 1 2 3 5 6 10 15 30 1031 2062 3093 5155 6186 10310 15465 30930 426871 853742 1280613 2134355 2561226 4268710 6403065 12806130 440104001 880208002 1320312003 2200520005 2640624006 4401040010 6601560015 13203120030