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18125920795 = 517213246127
BaseRepresentation
bin10000111000011000…
…111001101000011011
31201210020010011212211
4100320120321220123
5244110213431140
612154341215551
71211114533063
oct207030715033
951706104784
1018125920795
117761678634
12361a4015b7
13192b34b428
14c3d4483a3
1571147d2ea
hex438639a1b

18125920795 has 8 divisors (see below), whose sum is σ = 23030581824. Its totient is φ = 13647752064.

The previous prime is 18125920723. The next prime is 18125920807. The reversal of 18125920795 is 59702952181.

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 18125920795 - 27 = 18125920667 is a prime.

It is a super-2 number, since 2×181259207952 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106622979 + ... + 106623148.

It is an arithmetic number, because the mean of its divisors is an integer number (2878822728).

Almost surely, 218125920795 is an apocalyptic number.

18125920795 is a deficient number, since it is larger than the sum of its proper divisors (4904661029).

18125920795 is a wasteful number, since it uses less digits than its factorization.

18125920795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213246149.

The product of its (nonzero) digits is 453600, while the sum is 49.

The spelling of 18125920795 in words is "eighteen billion, one hundred twenty-five million, nine hundred twenty thousand, seven hundred ninety-five".

Divisors: 1 5 17 85 213246127 1066230635 3625184159 18125920795