20980050 has 192 divisors, whose sum is σ = 67495680. Its totient is φ = 4193280.

The previous prime is 20980039. The next prime is 20980051. The reversal of 20980050 is 5008902.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20980050.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20980051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 395824 + ... + 395876.

It is an arithmetic number, because the mean of its divisors is an integer number (351540).

Almost surely, 2^20980050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20980050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33747840).

20980050 is an abundant number, since it is smaller than the sum of its proper divisors (46515630).

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

20980050 is a wasteful number, since it uses less digits than its factorization.

20980050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 20980050 is about 4580.3984542832. The cubic root of 20980050 is about 275.8050240254.

Adding to 20980050 its reverse (5008902), we get a palindrome (25988952).

The spelling of 20980050 in words is "twenty million, nine hundred eighty thousand, fifty".