11620821 has 8 divisors (see below), whose sum is σ = 15690880. Its totient is φ = 7648992.

The previous prime is 11620801. The next prime is 11620823. The reversal of 11620821 is 12802611.

11620821 is digitally balanced in base 2, 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 not a de Polignac number, because 11620821 - 2⁵ = 11620789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11620823) 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, 24280 + ... + 24753.

It is an arithmetic number, because the mean of its divisors is an integer number (1961360).

Almost surely, 2^11620821 is an apocalyptic number.

It is an amenable number.

11620821 is a deficient number, since it is larger than the sum of its proper divisors (4070059).

11620821 is an equidigital number, since it uses as much as digits as its factorization.

11620821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49115.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 11620821 is about 3408.9325308665. The cubic root of 11620821 is about 226.5055965948.

The spelling of 11620821 in words is "eleven million, six hundred twenty thousand, eight hundred twenty-one".