20016444 has 24 divisors (see below), whose sum is σ = 53377408. Its totient is φ = 5718960.

The previous prime is 20016439. The next prime is 20016461. The reversal of 20016444 is 44461002.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20016444.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119062 + ... + 119229.

Almost surely, 2^20016444 is an apocalyptic number.

It is an amenable number.

20016444 is an abundant number, since it is smaller than the sum of its proper divisors (33360964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20016444 is a wasteful number, since it uses less digits than its factorization.

20016444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238305 (or 238303 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 20016444 is about 4473.9740723433. The cubic root of 20016444 is about 271.5161344189.

Adding to 20016444 its reverse (44461002), we get a palindrome (64477446).

The spelling of 20016444 in words is "twenty million, sixteen thousand, four hundred forty-four".