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18743138283 = 397722432851
BaseRepresentation
bin10001011101001011…
…011001011111101011
31210101020112002002210
4101131023121133223
5301341220411113
612335510300203
71232321022012
oct213513313753
953336462083
1018743138283
117a49016231
123771057663
1319c9194a8c
14c9b3d3a79
1574a74c6c3
hex45d2d97eb

18743138283 has 16 divisors (see below), whose sum is σ = 25036361856. Its totient is φ = 12472694400.

The previous prime is 18743138279. The next prime is 18743138317. The reversal of 18743138283 is 38283134781.

It is not a de Polignac number, because 18743138283 - 22 = 18743138279 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18743138263) 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, 6572808 + ... + 6575658.

It is an arithmetic number, because the mean of its divisors is an integer number (1564772616).

Almost surely, 218743138283 is an apocalyptic number.

18743138283 is a deficient number, since it is larger than the sum of its proper divisors (6293223573).

18743138283 is a wasteful number, since it uses less digits than its factorization.

18743138283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6074.

The product of its digits is 774144, while the sum is 48.

The spelling of 18743138283 in words is "eighteen billion, seven hundred forty-three million, one hundred thirty-eight thousand, two hundred eighty-three".

Divisors: 1 3 977 2243 2851 2931 6729 8553 2191411 2785427 6394793 6574233 8356281 19184379 6247712761 18743138283