20050400 has 72 divisors (see below), whose sum is σ = 49778064. Its totient is φ = 7884800.

The previous prime is 20050391. The next prime is 20050403. The reversal of 20050400 is 405002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20050403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56624 + ... + 56976.

It is an arithmetic number, because the mean of its divisors is an integer number (691362).

Almost surely, 2^20050400 is an apocalyptic number.

20050400 is a gapful number since it is divisible by the number (20) 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 20050400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24889032).

20050400 is an abundant number, since it is smaller than the sum of its proper divisors (29727664).

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

20050400 is a wasteful number, since it uses less digits than its factorization.

20050400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 20050400 is about 4477.7673007873. The cubic root of 20050400 is about 271.6695814777.

Adding to 20050400 its reverse (405002), we get a palindrome (20455402).

The spelling of 20050400 in words is "twenty million, fifty thousand, four hundred".