20042378 has 16 divisors (see below), whose sum is σ = 31902720. Its totient is φ = 9416736.

The previous prime is 20042357. The next prime is 20042389. The reversal of 20042378 is 87324002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2750 + ... + 6902.

It is an arithmetic number, because the mean of its divisors is an integer number (1993920).

Almost surely, 2^20042378 is an apocalyptic number.

20042378 is a deficient number, since it is larger than the sum of its proper divisors (11860342).

20042378 is a wasteful number, since it uses less digits than its factorization.

20042378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4301.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 20042378 is about 4476.8714522532. The cubic root of 20042378 is about 271.6333457236.

The spelling of 20042378 in words is "twenty million, forty-two thousand, three hundred seventy-eight".