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180030023 = 1669107867
BaseRepresentation
bin10101011101100…
…00101001000111
3110112202110202122
422232300221013
5332041430043
625510400155
74314141605
oct1256605107
9415673678
10180030023
1192693248
125036005b
132b3b4754
1419ca4875
1510c12368
hexabb0a47

180030023 has 4 divisors (see below), whose sum is σ = 180139560. Its totient is φ = 179920488.

The previous prime is 180029977. The next prime is 180030043. The reversal of 180030023 is 320030081.

180030023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 180030023 - 212 = 180025927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 180029983 and 180030010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180030043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52265 + ... + 55602.

It is an arithmetic number, because the mean of its divisors is an integer number (45034890).

Almost surely, 2180030023 is an apocalyptic number.

180030023 is a deficient number, since it is larger than the sum of its proper divisors (109537).

180030023 is a wasteful number, since it uses less digits than its factorization.

180030023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109536.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 180030023 is about 13417.5267094946. The cubic root of 180030023 is about 564.6530074998.

The spelling of 180030023 in words is "one hundred eighty million, thirty thousand, twenty-three".

Divisors: 1 1669 107867 180030023