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19380169 = 36752807
BaseRepresentation
bin100100111101…
…1011111001001
31100110121121001
41021323133021
514430131134
61531215001
7323504644
oct111733711
940417531
1019380169
11aa37676
1265a7461
134027273
142806a5b
151a7c414
hex127b7c9

19380169 has 4 divisors (see below), whose sum is σ = 19433344. Its totient is φ = 19326996.

The previous prime is 19380131. The next prime is 19380173. The reversal of 19380169 is 96108391.

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: 96108391 = 809118799.

It is a cyclic number.

It is not a de Polignac number, because 19380169 - 215 = 19347401 is a prime.

It is a super-2 number, since 2×193801692 = 751181900937122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19380199) 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, 26037 + ... + 26770.

It is an arithmetic number, because the mean of its divisors is an integer number (4858336).

Almost surely, 219380169 is an apocalyptic number.

It is an amenable number.

19380169 is a deficient number, since it is larger than the sum of its proper divisors (53175).

19380169 is an equidigital number, since it uses as much as digits as its factorization.

19380169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53174.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 19380169 is about 4402.2913352026. The cubic root of 19380169 is about 268.6081505625.

The spelling of 19380169 in words is "nineteen million, three hundred eighty thousand, one hundred sixty-nine".

Divisors: 1 367 52807 19380169