20040216 has 48 divisors (see below), whose sum is σ = 58283640. Its totient is φ = 5725440.

The previous prime is 20040203. The next prime is 20040221. The reversal of 20040216 is 61204002.

It is a super-2 number, since 2×20040216² = 803220514653312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20040195 and 20040204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7345 + ... + 9696.

Almost surely, 2^20040216 is an apocalyptic number.

It is an amenable number.

20040216 is an abundant number, since it is smaller than the sum of its proper divisors (38243424).

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

20040216 is a wasteful number, since it uses less digits than its factorization.

20040216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17064 (or 17053 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 20040216 is about 4476.6299824757. The cubic root of 20040216 is about 271.6235782131.

Adding to 20040216 its reverse (61204002), we get a palindrome (81244218).

The spelling of 20040216 in words is "twenty million, forty thousand, two hundred sixteen".