2178004020 has 48 divisors (see below), whose sum is σ = 6102976320. Its totient is φ = 580366336.

The previous prime is 2178004019. The next prime is 2178004043. The reversal of 2178004020 is 204008712.

It is a super-2 number, since 2×2178004020² = 9487403022272320800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71659 + ... + 97421.

It is an arithmetic number, because the mean of its divisors is an integer number (127145340).

Almost surely, 2^2178004020 is an apocalyptic number.

2178004020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2178004020 is an abundant number, since it is smaller than the sum of its proper divisors (3924972300).

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

2178004020 is a wasteful number, since it uses less digits than its factorization.

2178004020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27184 (or 27182 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 2178004020 is about 46669.0906275235. The cubic root of 2178004020 is about 1296.2424076934.

The spelling of 2178004020 in words is "two billion, one hundred seventy-eight million, four thousand, twenty".