11820445 has 32 divisors (see below), whose sum is σ = 17724672. Its totient is φ = 7368192.

The previous prime is 11820443. The next prime is 11820463. The reversal of 11820445 is 54402811.

It is not a de Polignac number, because 11820445 - 2¹ = 11820443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11820443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37609 + ... + 37921.

It is an arithmetic number, because the mean of its divisors is an integer number (553896).

Almost surely, 2^11820445 is an apocalyptic number.

It is an amenable number.

11820445 is a deficient number, since it is larger than the sum of its proper divisors (5904227).

11820445 is a wasteful number, since it uses less digits than its factorization.

11820445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 11820445 is about 3438.0874043573. The cubic root of 11820445 is about 227.7952211287.

The spelling of 11820445 in words is "eleven million, eight hundred twenty thousand, four hundred forty-five".