20049216 has 84 divisors (see below), whose sum is σ = 58375296. Its totient is φ = 6068480.

The previous prime is 20049209. The next prime is 20049217. The reversal of 20049216 is 61294002.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20049217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22801 + ... + 23663.

It is an arithmetic number, because the mean of its divisors is an integer number (694944).

Almost surely, 2^20049216 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 20049216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29187648).

20049216 is an abundant number, since it is smaller than the sum of its proper divisors (38326080).

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

20049216 is a wasteful number, since it uses less digits than its factorization.

20049216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900 (or 879 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 20049216 is about 4477.6350900894. The cubic root of 20049216 is about 271.6642339016.

Multiplying 20049216 by its sum of digits (24), we get a palindrome (481181184).

The spelling of 20049216 in words is "twenty million, forty-nine thousand, two hundred sixteen".