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18800054 = 2713531949
BaseRepresentation
bin100011110110…
…1110110110110
31022101010211022
41013231312312
514303100204
61510541142
7315540440
oct107556666
938333738
1018800054
11a680839
1263677b2
133b831c0
1426d5490
1519b55be
hex11eddb6

18800054 has 32 divisors (see below), whose sum is σ = 35380800. Its totient is φ = 7293312.

The previous prime is 18800053. The next prime is 18800059. The reversal of 18800054 is 45000881.

18800054 = 132 + 142 + ... + 3832.

It is a super-3 number, since 3×188000543 (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 18799996 and 18800032.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18800051) 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, 8672 + ... + 10620.

It is an arithmetic number, because the mean of its divisors is an integer number (1105650).

Almost surely, 218800054 is an apocalyptic number.

18800054 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18800054 is a deficient number, since it is larger than the sum of its proper divisors (16580746).

18800054 is a wasteful number, since it uses less digits than its factorization.

18800054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 18800054 is about 4335.9029048169. The cubic root of 18800054 is about 265.9008336323.

The spelling of 18800054 in words is "eighteen million, eight hundred thousand, fifty-four".

Divisors: 1 2 7 13 14 26 53 91 106 182 371 689 742 1378 1949 3898 4823 9646 13643 25337 27286 50674 103297 177359 206594 354718 723079 1342861 1446158 2685722 9400027 18800054