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18430061 = 1323531163
BaseRepresentation
bin100011001001…
…1100001101101
31021200100021212
41012103201231
514204230221
61455004205
7312436646
oct106234155
937610255
1018430061
11a448861
126209665
133a83980
14263a6cd
151940b5b
hex119386d

18430061 has 16 divisors (see below), whose sum is σ = 21119616. Its totient is φ = 15951936.

The previous prime is 18430043. The next prime is 18430079. The reversal of 18430061 is 16003481.

It is an interprime number because it is at equal distance from previous prime (18430043) and next prime (18430079).

It is not a de Polignac number, because 18430061 - 222 = 14235757 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18430081) 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, 15266 + ... + 16428.

It is an arithmetic number, because the mean of its divisors is an integer number (1319976).

Almost surely, 218430061 is an apocalyptic number.

It is an amenable number.

18430061 is a deficient number, since it is larger than the sum of its proper divisors (2689555).

18430061 is a wasteful number, since it uses less digits than its factorization.

18430061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 18430061 is about 4293.0246912870. The cubic root of 18430061 is about 264.1449168018.

The spelling of 18430061 in words is "eighteen million, four hundred thirty thousand, sixty-one".

Divisors: 1 13 23 53 299 689 1163 1219 15119 15847 26749 61639 347737 801307 1417697 18430061