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18480941 = 531572221
BaseRepresentation
bin100011001111…
…1111100101101
31021202221002022
41012133330231
514212342231
61500035525
7313041203
oct106377455
937687068
1018480941
11a483006
126232ba5
133aa0b8b
142651073
151950c7b
hex119ff2d

18480941 has 8 divisors (see below), whose sum is σ = 18958104. Its totient is φ = 18008640.

The previous prime is 18480911. The next prime is 18480971. The reversal of 18480941 is 14908481.

It is an interprime number because it is at equal distance from previous prime (18480911) and next prime (18480971).

It can be written as a sum of positive squares in 4 ways, for example, as 4116841 + 14364100 = 2029^2 + 3790^2 .

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 18480941 - 214 = 18464557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18480911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7211 + ... + 9431.

It is an arithmetic number, because the mean of its divisors is an integer number (2369763).

Almost surely, 218480941 is an apocalyptic number.

It is an amenable number.

18480941 is a deficient number, since it is larger than the sum of its proper divisors (477163).

18480941 is a wasteful number, since it uses less digits than its factorization.

With its successor (18480942) it forms an eRAP, since the sums of their prime factors are consecutive (2431 and 2432).

18480941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 18480941 is about 4298.9464988529. The cubic root of 18480941 is about 264.3877690386.

The spelling of 18480941 in words is "eighteen million, four hundred eighty thousand, nine hundred forty-one".

Divisors: 1 53 157 2221 8321 117713 348697 18480941