11918819 has 8 divisors (see below), whose sum is σ = 13767408. Its totient is φ = 10197760.

The previous prime is 11918813. The next prime is 11918821. The reversal of 11918819 is 91881911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11918819 is a prime.

It is a super-2 number, since 2×11918819² = 284116492709522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11918813) 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, 31682 + ... + 32055.

It is an arithmetic number, because the mean of its divisors is an integer number (1720926).

Almost surely, 2^11918819 is an apocalyptic number.

11918819 is a deficient number, since it is larger than the sum of its proper divisors (1848589).

11918819 is a wasteful number, since it uses less digits than its factorization.

11918819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63765.

The product of its digits is 5184, while the sum is 38.

The square root of 11918819 is about 3452.3642623570. The cubic root of 11918819 is about 228.4254074236.

The spelling of 11918819 in words is "eleven million, nine hundred eighteen thousand, eight hundred nineteen".