13921850 has 12 divisors (see below), whose sum is σ = 25894734. Its totient is φ = 5568720.

The previous prime is 13921849. The next prime is 13921871. The reversal of 13921850 is 5812931.

It can be written as a sum of positive squares in 3 ways, for example, as 5793649 + 8128201 = 2407^2 + 2851^2 .

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 5 ways as a sum of consecutive naturals, for example, 139169 + ... + 139268.

Almost surely, 2^13921850 is an apocalyptic number.

13921850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13921850 is a deficient number, since it is larger than the sum of its proper divisors (11972884).

13921850 is a wasteful number, since it uses less digits than its factorization.

13921850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278449 (or 278444 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 13921850 is about 3731.1995390223. The cubic root of 13921850 is about 240.5649307525.

The spelling of 13921850 in words is "thirteen million, nine hundred twenty-one thousand, eight hundred fifty".