2180478393 has 16 divisors (see below), whose sum is σ = 3235632640. Its totient is φ = 1451269872.

The previous prime is 2180478371. The next prime is 2180478449. The reversal of 2180478393 is 3938740812.

2180478393 is a `hidden beast` number, since 218 + 0 + 47 + 8 + 393 = 666.

It is not a de Polignac number, because 2180478393 - 2⁸ = 2180478137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2180478793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49321 + ... + 82422.

It is an arithmetic number, because the mean of its divisors is an integer number (202227040).

Almost surely, 2^2180478393 is an apocalyptic number.

It is an amenable number.

2180478393 is a deficient number, since it is larger than the sum of its proper divisors (1055154247).

2180478393 is a wasteful number, since it uses less digits than its factorization.

2180478393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132365 (or 132359 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 2180478393 is about 46695.5928648518. The cubic root of 2180478393 is about 1296.7330975394.

The spelling of 2180478393 in words is "two billion, one hundred eighty million, four hundred seventy-eight thousand, three hundred ninety-three".