20020016 has 40 divisors (see below), whose sum is σ = 41582160. Its totient is φ = 9304064.

The previous prime is 20020001. The next prime is 20020019. The reversal of 20020016 is 61002002.

It is a junction number, because it is equal to n+sod(n) for n = 20019979 and 20020006.

It is not an unprimeable number, because it can be changed into a prime (20020019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23795 + ... + 24621.

It is an arithmetic number, because the mean of its divisors is an integer number (1039554).

Almost surely, 2^20020016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20020016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20791080).

20020016 is an abundant number, since it is smaller than the sum of its proper divisors (21562144).

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

20020016 is a wasteful number, since it uses less digits than its factorization.

20020016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941 (or 935 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 20020016 is about 4474.3732521997. The cubic root of 20020016 is about 271.5322844395.

Adding to 20020016 its reverse (61002002), we get a palindrome (81022018).

The spelling of 20020016 in words is "twenty million, twenty thousand, sixteen".