2181770330 has 32 divisors (see below), whose sum is σ = 3954528000. Its totient is φ = 866650752.

The previous prime is 2181770303. The next prime is 2181770333. The reversal of 2181770330 is 330771812.

It is not an unprimeable number, because it can be changed into a prime (2181770333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1828214 + ... + 1829406.

It is an arithmetic number, because the mean of its divisors is an integer number (123579000).

Almost surely, 2^2181770330 is an apocalyptic number.

2181770330 is a deficient number, since it is larger than the sum of its proper divisors (1772757670).

2181770330 is a wasteful number, since it uses less digits than its factorization.

2181770330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 2181770330 is about 46709.4244237713. The cubic root of 2181770330 is about 1296.9891524660.

The spelling of 2181770330 in words is "two billion, one hundred eighty-one million, seven hundred seventy thousand, three hundred thirty".