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19419331 = 1091631093
BaseRepresentation
bin100101000010…
…1000011000011
31100112121022111
41022011003003
514432404311
61532120151
7324030061
oct112050303
940477274
1019419331
11aa64038
126606057
13403c039
142817031
151a88d21
hex12850c3

19419331 has 8 divisors (see below), whose sum is σ = 19735760. Its totient is φ = 19105632.

The previous prime is 19419317. The next prime is 19419343. The reversal of 19419331 is 13391491.

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 19419331 - 27 = 19419203 is a prime.

It is a super-2 number, since 2×194193312 = 754220832975122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19419293 and 19419302.

It is not an unprimeable number, because it can be changed into a prime (19419391) 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, 17221 + ... + 18313.

It is an arithmetic number, because the mean of its divisors is an integer number (2466970).

Almost surely, 219419331 is an apocalyptic number.

19419331 is the 2356-th centered heptagonal number.

19419331 is a deficient number, since it is larger than the sum of its proper divisors (316429).

19419331 is a wasteful number, since it uses less digits than its factorization.

19419331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1365.

The product of its digits is 2916, while the sum is 31.

The square root of 19419331 is about 4406.7370014558. The cubic root of 19419331 is about 268.7889566026.

The spelling of 19419331 in words is "nineteen million, four hundred nineteen thousand, three hundred thirty-one".

Divisors: 1 109 163 1093 17767 119137 178159 19419331