20413420 has 48 divisors (see below), whose sum is σ = 45158400. Its totient is φ = 7736256.

The previous prime is 20413409. The next prime is 20413441. The reversal of 20413420 is 2431402.

It is a junction number, because it is equal to n+sod(n) for n = 20413394 and 20413403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91429 + ... + 91651.

It is an arithmetic number, because the mean of its divisors is an integer number (940800).

Almost surely, 2^20413420 is an apocalyptic number.

20413420 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 20413420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22579200).

20413420 is an abundant number, since it is smaller than the sum of its proper divisors (24744980).

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

20413420 is a wasteful number, since it uses less digits than its factorization.

20413420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 452 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20413420 is about 4518.1212909792. The cubic root of 20413420 is about 273.2993447062.

Adding to 20413420 its reverse (2431402), we get a palindrome (22844822).

The spelling of 20413420 in words is "twenty million, four hundred thirteen thousand, four hundred twenty".