13663850 has 36 divisors (see below), whose sum is σ = 26858214. Its totient is φ = 5171040.

The previous prime is 13663849. The next prime is 13663861. The reversal of 13663850 is 5836631.

It can be written as a sum of positive squares in 3 ways, for example, as 10804369 + 2859481 = 3287^2 + 1691^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 17672 + ... + 18428.

Almost surely, 2^13663850 is an apocalyptic number.

13663850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13663850 is a deficient number, since it is larger than the sum of its proper divisors (13194364).

13663850 is a wasteful number, since it uses less digits than its factorization.

13663850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807 (or 783 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 13663850 is about 3696.4645270853. The cubic root of 13663850 is about 239.0696038586.

The spelling of 13663850 in words is "thirteen million, six hundred sixty-three thousand, eight hundred fifty".