20050420 has 48 divisors (see below), whose sum is σ = 46061568. Its totient is φ = 7286400.

The previous prime is 20050403. The next prime is 20050439. The reversal of 20050420 is 2405002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 20050420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16845 + ... + 17995.

It is an arithmetic number, because the mean of its divisors is an integer number (959616).

Almost surely, 2^20050420 is an apocalyptic number.

20050420 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 20050420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23030784).

20050420 is an abundant number, since it is smaller than the sum of its proper divisors (26011148).

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

20050420 is a wasteful number, since it uses less digits than its factorization.

20050420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240 (or 1238 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 20050420 is about 4477.7695340426. The cubic root of 20050420 is about 271.6696718065.

Adding to 20050420 its reverse (2405002), we get a palindrome (22455422).

The spelling of 20050420 in words is "twenty million, fifty thousand, four hundred twenty".