11810819 has 4 divisors (see below), whose sum is σ = 11817696. Its totient is φ = 11803944.

The previous prime is 11810803. The next prime is 11810833. The reversal of 11810819 is 91801811.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 91801811 = 8663 ⋅10597.

It is a cyclic number.

It is not a de Polignac number, because 11810819 - 2⁴ = 11810803 is a prime.

It is a super-2 number, since 2×11810819² = 278990890901522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11810791 and 11810800.

It is not an unprimeable number, because it can be changed into a prime (11810879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1577 + ... + 5109.

It is an arithmetic number, because the mean of its divisors is an integer number (2954424).

Almost surely, 2^11810819 is an apocalyptic number.

11810819 is a deficient number, since it is larger than the sum of its proper divisors (6877).

11810819 is an equidigital number, since it uses as much as digits as its factorization.

11810819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6876.

The product of its (nonzero) digits is 576, while the sum is 29.

The square root of 11810819 is about 3436.6872130003. The cubic root of 11810819 is about 227.7333691907.

The spelling of 11810819 in words is "eleven million, eight hundred ten thousand, eight hundred nineteen".