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18898515013 = 75623480133
BaseRepresentation
bin10001100110011100…
…000111010001000101
31210210001220000220111
4101212130013101011
5302201004440023
612403140433021
71236215504260
oct214634072105
953701800814
1018898515013
1180187a0054
1237b50a8771
131a22427081
14cb3cbbcd7
157591e000d
hex466707445

18898515013 has 8 divisors (see below), whose sum is σ = 21602188928. Its totient is φ = 16195812624.

The previous prime is 18898514959. The next prime is 18898515017. The reversal of 18898515013 is 31051589881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18898515013 - 221 = 18896417861 is a prime.

It is a super-3 number, since 3×188985150133 (a number of 32 digits) contains 333 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 (18898515017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200706 + ... + 279427.

It is an arithmetic number, because the mean of its divisors is an integer number (2700273616).

Almost surely, 218898515013 is an apocalyptic number.

It is an amenable number.

18898515013 is a deficient number, since it is larger than the sum of its proper divisors (2703673915).

18898515013 is an equidigital number, since it uses as much as digits as its factorization.

18898515013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485763.

The product of its (nonzero) digits is 345600, while the sum is 49.

The spelling of 18898515013 in words is "eighteen billion, eight hundred ninety-eight million, five hundred fifteen thousand, thirteen".

Divisors: 1 7 5623 39361 480133 3360931 2699787859 18898515013