2168111840 has 48 divisors (see below), whose sum is σ = 5128274592. Its totient is φ = 866210304.

The previous prime is 2168111819. The next prime is 2168111849. The reversal of 2168111840 is 481118612.

It is a happy number.

It is a super-3 number, since 3×2168111840³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 2168111797 and 2168111806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2168111849) 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, 134282 + ... + 149558.

It is an arithmetic number, because the mean of its divisors is an integer number (106839054).

Almost surely, 2^2168111840 is an apocalyptic number.

2168111840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2168111840 is an abundant number, since it is smaller than the sum of its proper divisors (2960162752).

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

2168111840 is a wasteful number, since it uses less digits than its factorization.

2168111840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16179 (or 16171 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 32.

The square root of 2168111840 is about 46562.9878766387. The cubic root of 2168111840 is about 1294.2769804596.

The spelling of 2168111840 in words is "two billion, one hundred sixty-eight million, one hundred eleven thousand, eight hundred forty".