20049984 has 112 divisors (see below), whose sum is σ = 60594240. Its totient is φ = 6497280.

The previous prime is 20049983. The next prime is 20049989. The reversal of 20049984 is 48994002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20049983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70707 + ... + 70989.

It is an arithmetic number, because the mean of its divisors is an integer number (541020).

Almost surely, 2^20049984 is an apocalyptic number.

20049984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20049984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30297120).

20049984 is an abundant number, since it is smaller than the sum of its proper divisors (40544256).

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

20049984 is a wasteful number, since it uses less digits than its factorization.

20049984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 20049984 is about 4477.7208488248. The cubic root of 20049984 is about 271.6677026236.

It can be divided in two parts, 2004998 and 4, that added together give a palindrome (2005002).

The spelling of 20049984 in words is "twenty million, forty-nine thousand, nine hundred eighty-four".