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12508900343 = 19577638959
BaseRepresentation
bin10111010011001011…
…01010101111110111
31012021202200222101022
423221211222233313
5201104234302333
65425125051355
7621660620132
oct135145525767
935252628338
1012508900343
115339a47a75
122511256b5b
131244714aa4
1486944d219
154d3295c98
hex2e996abf7

12508900343 has 4 divisors (see below), whose sum is σ = 12509558880. Its totient is φ = 12508241808.

The previous prime is 12508900333. The next prime is 12508900357. The reversal of 12508900343 is 34300980521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34300980521 = 41836609281.

It is a cyclic number.

It is not a de Polignac number, because 12508900343 - 28 = 12508900087 is a prime.

It is a super-2 number, since 2×125089003432 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12508900333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299903 + ... + 339056.

It is an arithmetic number, because the mean of its divisors is an integer number (3127389720).

Almost surely, 212508900343 is an apocalyptic number.

12508900343 is a deficient number, since it is larger than the sum of its proper divisors (658537).

12508900343 is an equidigital number, since it uses as much as digits as its factorization.

12508900343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658536.

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 12508900343 in words is "twelve billion, five hundred eight million, nine hundred thousand, three hundred forty-three".

Divisors: 1 19577 638959 12508900343