20250420 has 96 divisors (see below), whose sum is σ = 59609088. Its totient is φ = 5131392.

The previous prime is 20250413. The next prime is 20250421. The reversal of 20250420 is 2405202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20250420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20250421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121177 + ... + 121343.

It is an arithmetic number, because the mean of its divisors is an integer number (620928).

Almost surely, 2^20250420 is an apocalyptic number.

20250420 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 20250420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29804544).

20250420 is an abundant number, since it is smaller than the sum of its proper divisors (39358668).

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

20250420 is a wasteful number, since it uses less digits than its factorization.

20250420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 20250420 is about 4500.0466664247. The cubic root of 20250420 is about 272.5699733331.

Adding to 20250420 its reverse (2405202), we get a palindrome (22655622).

The spelling of 20250420 in words is "twenty million, two hundred fifty thousand, four hundred twenty".