20240420 has 24 divisors (see below), whose sum is σ = 42638400. Its totient is φ = 8070752.

The previous prime is 20240419. The next prime is 20240431. The reversal of 20240420 is 2404202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20240395 and 20240404.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5771 + ... + 8589.

It is an arithmetic number, because the mean of its divisors is an integer number (1776600).

Almost surely, 2^20240420 is an apocalyptic number.

20240420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20240420 is an abundant number, since it is smaller than the sum of its proper divisors (22397980).

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

20240420 is a wasteful number, since it uses less digits than its factorization.

20240420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3187 (or 3185 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 20240420 is about 4498.9354296322. The cubic root of 20240420 is about 272.5250993911.

Adding to 20240420 its reverse (2404202), we get a palindrome (22644622).

The spelling of 20240420 in words is "twenty million, two hundred forty thousand, four hundred twenty".