20042936 has 16 divisors (see below), whose sum is σ = 39214800. Its totient is φ = 9585664.

The previous prime is 20042933. The next prime is 20042947. The reversal of 20042936 is 63924002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20042933) 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, 54281 + ... + 54648.

It is an arithmetic number, because the mean of its divisors is an integer number (2450925).

Almost surely, 2^20042936 is an apocalyptic number.

It is an amenable number.

20042936 is a deficient number, since it is larger than the sum of its proper divisors (19171864).

20042936 is a wasteful number, since it uses less digits than its factorization.

20042936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108958 (or 108954 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 20042936 is about 4476.9337721257. The cubic root of 20042936 is about 271.6358665489.

Adding to 20042936 its reverse (63924002), we get a palindrome (83966938).

The spelling of 20042936 in words is "twenty million, forty-two thousand, nine hundred thirty-six".