2178420042 has 8 divisors (see below), whose sum is σ = 4356840096. Its totient is φ = 726140012.

The previous prime is 2178420019. The next prime is 2178420043. The reversal of 2178420042 is 2400248712.

It is a sphenic number, since it is the product of 3 distinct primes.

2178420042 is an admirable number.

It is a super-3 number, since 3×2178420042³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2178419991 and 2178420009.

It is not an unprimeable number, because it can be changed into a prime (2178420043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181534998 + ... + 181535009.

It is an arithmetic number, because the mean of its divisors is an integer number (544605012).

Almost surely, 2^2178420042 is an apocalyptic number.

2178420042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2178420042 is a wasteful number, since it uses less digits than its factorization.

2178420042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363070012.

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 2178420042 is about 46673.5475617614. The cubic root of 2178420042 is about 1296.3249344813.

Adding to 2178420042 its reverse (2400248712), we get a palindrome (4578668754).

The spelling of 2178420042 in words is "two billion, one hundred seventy-eight million, four hundred twenty thousand, forty-two".