20420044 has 12 divisors (see below), whose sum is σ = 37288944. Its totient is φ = 9766064.

The previous prime is 20420033. The next prime is 20420051. The reversal of 20420044 is 44002402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110887 + ... + 111070.

It is an arithmetic number, because the mean of its divisors is an integer number (3107412).

Almost surely, 2^20420044 is an apocalyptic number.

It is an amenable number.

20420044 is a deficient number, since it is larger than the sum of its proper divisors (16868900).

20420044 is a wasteful number, since it uses less digits than its factorization.

20420044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221984 (or 221982 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 20420044 is about 4518.8542795713. The cubic root of 20420044 is about 273.3289026977.

Adding to 20420044 its reverse (44002402), we get a palindrome (64422446).

The spelling of 20420044 in words is "twenty million, four hundred twenty thousand, forty-four".