20140042 has 16 divisors (see below), whose sum is σ = 33949440. Its totient is φ = 8890992.

The previous prime is 20140031. The next prime is 20140067. The reversal of 20140042 is 24004102.

It is a Harshad number since it is a multiple of its sum of digits (13).

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, 16242 + ... + 17437.

It is an arithmetic number, because the mean of its divisors is an integer number (2121840).

Almost surely, 2^20140042 is an apocalyptic number.

20140042 is a deficient number, since it is larger than the sum of its proper divisors (13809398).

20140042 is a wasteful number, since it uses less digits than its factorization.

20140042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33717.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 20140042 is about 4487.7658138544. The cubic root of 20140042 is about 272.0738427685.

Adding to 20140042 its reverse (24004102), we get a palindrome (44144144).

The spelling of 20140042 in words is "twenty million, one hundred forty thousand, forty-two".