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18069495975 = 325280308871
BaseRepresentation
bin10000110101000001…
…101010000010100111
31201122021221111120200
4100311001222002213
5244001242332400
612145004001543
71206531116166
oct206501520247
951567844520
1018069495975
117732839853
1236035302b3
13191c75386b
14c35b5b3dd
1570b534b00
hex43506a0a7

18069495975 has 18 divisors (see below), whose sum is σ = 32364475416. Its totient is φ = 9637064400.

The previous prime is 18069495931. The next prime is 18069496007. The reversal of 18069495975 is 57959496081.

18069495975 is a `hidden beast` number, since 1 + 80 + 69 + 495 + 9 + 7 + 5 = 666.

It is not a de Polignac number, because 18069495975 - 213 = 18069487783 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 40154211 + ... + 40154660.

It is an arithmetic number, because the mean of its divisors is an integer number (1798026412).

Almost surely, 218069495975 is an apocalyptic number.

18069495975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18069495975 is a deficient number, since it is larger than the sum of its proper divisors (14294979441).

18069495975 is a wasteful number, since it uses less digits than its factorization.

18069495975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80308887 (or 80308879 counting only the distinct ones).

The product of its (nonzero) digits is 24494400, while the sum is 63.

It can be divided in two parts, 180 and 69495975, that added together give a triangular number (69496155 = T11789).

The spelling of 18069495975 in words is "eighteen billion, sixty-nine million, four hundred ninety-five thousand, nine hundred seventy-five".

Divisors: 1 3 5 9 15 25 45 75 225 80308871 240926613 401544355 722779839 1204633065 2007721775 3613899195 6023165325 18069495975