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19999696 = 242354347
BaseRepresentation
bin100110001001…
…0101111010000
31101122002102111
41030102233100
520104442241
61552355104
7331665103
oct114225720
941562374
1019999696
1110320082
126845a94
1341b3252
14292873a
151b50c81
hex1312bd0

19999696 has 20 divisors (see below), whose sum is σ = 40434912. Its totient is φ = 9564896.

The previous prime is 19999663. The next prime is 19999697. The reversal of 19999696 is 69699991.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 19999696.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19999697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26806 + ... + 27541.

Almost surely, 219999696 is an apocalyptic number.

19999696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19999696 is an abundant number, since it is smaller than the sum of its proper divisors (20435216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19999696 is a wasteful number, since it uses less digits than its factorization.

19999696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54378 (or 54372 counting only the distinct ones).

The product of its digits is 2125764, while the sum is 58.

The square root of 19999696 is about 4472.1019666372. The cubic root of 19999696 is about 271.4403863476.

The spelling of 19999696 in words is "nineteen million, nine hundred ninety-nine thousand, six hundred ninety-six".

Divisors: 1 2 4 8 16 23 46 92 184 368 54347 108694 217388 434776 869552 1249981 2499962 4999924 9999848 19999696