11681916 has 36 divisors (see below), whose sum is σ = 28193256. Its totient is φ = 3764640.

The previous prime is 11681911. The next prime is 11681933. The reversal of 11681916 is 61918611.

It is a super-2 number, since 2×11681916² = 272934322862112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11681911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11026 + ... + 12038.

It is an arithmetic number, because the mean of its divisors is an integer number (783146).

Almost surely, 2^11681916 is an apocalyptic number.

It is an amenable number.

11681916 is an abundant number, since it is smaller than the sum of its proper divisors (16511340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11681916 is a wasteful number, since it uses less digits than its factorization.

11681916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082 (or 1049 counting only the distinct ones).

The product of its digits is 2592, while the sum is 33.

The square root of 11681916 is about 3417.8818001798. The cubic root of 11681916 is about 226.9018445267.

The spelling of 11681916 in words is "eleven million, six hundred eighty-one thousand, nine hundred sixteen".