20262420 has 96 divisors (see below), whose sum is σ = 63705600. Its totient is φ = 5346432.

The previous prime is 20262413. The next prime is 20262433. The reversal of 20262420 is 2426202.

It is a happy number.

20262420 is a `hidden beast` number, since 20 + 2 + 624 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20262393 and 20262402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84661 + ... + 84899.

It is an arithmetic number, because the mean of its divisors is an integer number (663600).

Almost surely, 2^20262420 is an apocalyptic number.

20262420 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 20262420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31852800).

20262420 is an abundant number, since it is smaller than the sum of its proper divisors (43443180).

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

20262420 is a wasteful number, since it uses less digits than its factorization.

20262420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414 (or 406 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 20262420 is about 4501.3797884649. The cubic root of 20262420 is about 272.6238025675.

Adding to 20262420 its reverse (2426202), we get a palindrome (22688622).

The spelling of 20262420 in words is "twenty million, two hundred sixty-two thousand, four hundred twenty".