11820851 has 8 divisors (see below), whose sum is σ = 13530624. Its totient is φ = 10116360.

The previous prime is 11820847. The next prime is 11820857. The reversal of 11820851 is 15802811.

11820851 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 11820851 - 2² = 11820847 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11820851.

It is not an unprimeable number, because it can be changed into a prime (11820857) 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, 6956 + ... + 8486.

It is an arithmetic number, because the mean of its divisors is an integer number (1691328).

Almost surely, 2^11820851 is an apocalyptic number.

11820851 is a deficient number, since it is larger than the sum of its proper divisors (1709773).

11820851 is a wasteful number, since it uses less digits than its factorization.

11820851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2641.

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

The square root of 11820851 is about 3438.1464483061. The cubic root of 11820851 is about 227.7978291468.

The spelling of 11820851 in words is "eleven million, eight hundred twenty thousand, eight hundred fifty-one".