2118367780 has 24 divisors (see below), whose sum is σ = 4449804408. Its totient is φ = 847112448.

The previous prime is 2118367763. The next prime is 2118367789. The reversal of 2118367780 is 877638112.

It can be written as a sum of positive squares in 4 ways, for example, as 654234084 + 1464133696 = 25578^2 + 38264^2 .

It is not an unprimeable number, because it can be changed into a prime (2118367789) 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, 71782 + ... + 96898.

It is an arithmetic number, because the mean of its divisors is an integer number (185408517).

Almost surely, 2^2118367780 is an apocalyptic number.

2118367780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2118367780 is an abundant number, since it is smaller than the sum of its proper divisors (2331436628).

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

2118367780 is a wasteful number, since it uses less digits than its factorization.

2118367780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29343 (or 29341 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 2118367780 is about 46025.7295433761. The cubic root of 2118367780 is about 1284.3018872983.

The spelling of 2118367780 in words is "two billion, one hundred eighteen million, three hundred sixty-seven thousand, seven hundred eighty".