11819955 has 16 divisors (see below), whose sum is σ = 21613824. Its totient is φ = 5403360.

The previous prime is 11819921. The next prime is 11819987. The reversal of 11819955 is 55991811.

It is not a de Polignac number, because 11819955 - 2⁶ = 11819891 is a prime.

It is a super-2 number, since 2×11819955² = 279422672404050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56181 + ... + 56390.

It is an arithmetic number, because the mean of its divisors is an integer number (1350864).

Almost surely, 2^11819955 is an apocalyptic number.

11819955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11819955 is a deficient number, since it is larger than the sum of its proper divisors (9793869).

11819955 is a wasteful number, since it uses less digits than its factorization.

11819955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112586.

The product of its digits is 16200, while the sum is 39.

The square root of 11819955 is about 3438.0161430686. The cubic root of 11819955 is about 227.7920734412.

The spelling of 11819955 in words is "eleven million, eight hundred nineteen thousand, nine hundred fifty-five".