2180381385 has 192 divisors, whose sum is σ = 4722278400. Its totient is φ = 837817344.

The previous prime is 2180381369. The next prime is 2180381389. The reversal of 2180381385 is 5831830812.

It is not a de Polignac number, because 2180381385 - 2⁴ = 2180381369 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2180381389) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 9777384 + ... + 9777606.

It is an arithmetic number, because the mean of its divisors is an integer number (24595200).

Almost surely, 2^2180381385 is an apocalyptic number.

It is an amenable number.

2180381385 is an abundant number, since it is smaller than the sum of its proper divisors (2541897015).

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

2180381385 is a wasteful number, since it uses less digits than its factorization.

2180381385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 2180381385 is about 46694.5541257222. The cubic root of 2180381385 is about 1296.7138669965.

The spelling of 2180381385 in words is "two billion, one hundred eighty million, three hundred eighty-one thousand, three hundred eighty-five".