20242420 has 48 divisors (see below), whose sum is σ = 46884096. Its totient is φ = 7280000.

The previous prime is 20242373. The next prime is 20242433. The reversal of 20242420 is 2424202.

It is a super-3 number, since 3×20242420³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20242394 and 20242403.

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, 21765 + ... + 22675.

It is an arithmetic number, because the mean of its divisors is an integer number (976752).

Almost surely, 2^20242420 is an apocalyptic number.

20242420 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 20242420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23442048).

20242420 is an abundant number, since it is smaller than the sum of its proper divisors (26641676).

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

20242420 is a wasteful number, since it uses less digits than its factorization.

20242420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032 (or 1030 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 20242420 is about 4499.1576989477. The cubic root of 20242420 is about 272.5340753617.

Adding to 20242420 its reverse (2424202), we get a palindrome (22666622).

It can be divided in two parts, 2024 and 2420, that added together give a palindrome (4444).

The spelling of 20242420 in words is "twenty million, two hundred forty-two thousand, four hundred twenty".