20216034 has 64 divisors (see below), whose sum is σ = 48142080. Its totient is φ = 6272640.

The previous prime is 20216033. The next prime is 20216047. The reversal of 20216034 is 43061202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20215998 and 20216016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20216033) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50724 + ... + 51120.

It is an arithmetic number, because the mean of its divisors is an integer number (752220).

Almost surely, 2^20216034 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20216034, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24071040).

20216034 is an abundant number, since it is smaller than the sum of its proper divisors (27926046).

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

20216034 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 9 representation: 20216034 = (42032160)₉.

20216034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20216034 is about 4496.2244161074. The cubic root of 20216034 is about 272.4156077921.

Adding to 20216034 its reverse (43061202), we get a palindrome (63277236).

The spelling of 20216034 in words is "twenty million, two hundred sixteen thousand, thirty-four".