11821850 has 48 divisors (see below), whose sum is σ = 23569920. Its totient is φ = 4401600.

The previous prime is 11821847. The next prime is 11821853. The reversal of 11821850 is 5812811.

It is an interprime number because it is at equal distance from previous prime (11821847) and next prime (11821853).

It is a super-2 number, since 2×11821850² = 279512274845000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11821853) 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 23 ways as a sum of consecutive naturals, for example, 44819 + ... + 45081.

It is an arithmetic number, because the mean of its divisors is an integer number (491040).

Almost surely, 2^11821850 is an apocalyptic number.

11821850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11821850 is a deficient number, since it is larger than the sum of its proper divisors (11748070).

11821850 is a wasteful number, since it uses less digits than its factorization.

11821850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 330 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 26.

The square root of 11821850 is about 3438.2917270063. The cubic root of 11821850 is about 227.8042461585.

The spelling of 11821850 in words is "eleven million, eight hundred twenty-one thousand, eight hundred fifty".