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30380320873 = 74340045839
BaseRepresentation
bin11100010010110011…
…101110100001101001
32220102020221012112101
4130102303232201221
5444204330231443
621542335413401
72123565316030
oct342263564151
986366835471
1030380320873
111197a998801
125a7a384261
132b32106336
141682b69717
15bcc20184d
hex712cee869

30380320873 has 4 divisors (see below), whose sum is σ = 34720366720. Its totient is φ = 26040275028.

The previous prime is 30380320823. The next prime is 30380320897. The reversal of 30380320873 is 37802308303.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37802308303 = 151125018073.

It is a cyclic number.

It is not a de Polignac number, because 30380320873 - 225 = 30346766441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30380320823) 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, 2170022913 + ... + 2170022926.

It is an arithmetic number, because the mean of its divisors is an integer number (8680091680).

Almost surely, 230380320873 is an apocalyptic number.

It is an amenable number.

30380320873 is a deficient number, since it is larger than the sum of its proper divisors (4340045847).

30380320873 is an equidigital number, since it uses as much as digits as its factorization.

30380320873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4340045846.

The product of its (nonzero) digits is 72576, while the sum is 37.

The spelling of 30380320873 in words is "thirty billion, three hundred eighty million, three hundred twenty thousand, eight hundred seventy-three".

Divisors: 1 7 4340045839 30380320873