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19380959 = 131490843
BaseRepresentation
bin100100111101…
…1101011011111
31100110122200022
41021323223133
514430142314
61531222355
7323510153
oct111735337
940418608
1019380959
11aa38224
1265a79bb
134027730
142807063
151a7c78e
hex127badf

19380959 has 4 divisors (see below), whose sum is σ = 20871816. Its totient is φ = 17890104.

The previous prime is 19380953. The next prime is 19380971. The reversal of 19380959 is 95908391.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95908391 = 281341311.

It is a cyclic number.

It is not a de Polignac number, because 19380959 - 24 = 19380943 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 (19380953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745409 + ... + 745434.

It is an arithmetic number, because the mean of its divisors is an integer number (5217954).

Almost surely, 219380959 is an apocalyptic number.

19380959 is a deficient number, since it is larger than the sum of its proper divisors (1490857).

19380959 is a wasteful number, since it uses less digits than its factorization.

19380959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490856.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 19380959 is about 4402.3810602900. The cubic root of 19380959 is about 268.6118002994.

The spelling of 19380959 in words is "nineteen million, three hundred eighty thousand, nine hundred fifty-nine".

Divisors: 1 13 1490843 19380959