20378842 has 16 divisors (see below), whose sum is σ = 34424064. Its totient is φ = 8964000.

The previous prime is 20378837. The next prime is 20378863. The reversal of 20378842 is 24887302.

It is a junction number, because it is equal to n+sod(n) for n = 20378798 and 20378807.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14259 + ... + 15622.

It is an arithmetic number, because the mean of its divisors is an integer number (2151504).

Almost surely, 2^20378842 is an apocalyptic number.

20378842 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20378842 is a deficient number, since it is larger than the sum of its proper divisors (14045222).

20378842 is a wasteful number, since it uses less digits than its factorization.

20378842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29925.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 20378842 is about 4514.2930786558. The cubic root of 20378842 is about 273.1449448786.

The spelling of 20378842 in words is "twenty million, three hundred seventy-eight thousand, eight hundred forty-two".