20302420 has 48 divisors (see below), whose sum is σ = 45517248. Its totient is φ = 7580160.

The previous prime is 20302417. The next prime is 20302459. The reversal of 20302420 is 2420302.

It is a self number, because there is not a number n which added to its sum of digits gives 20302420.

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, 71599 + ... + 71881.

It is an arithmetic number, because the mean of its divisors is an integer number (948276).

Almost surely, 2^20302420 is an apocalyptic number.

20302420 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 20302420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22758624).

20302420 is an abundant number, since it is smaller than the sum of its proper divisors (25214828).

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

20302420 is a wasteful number, since it uses less digits than its factorization.

20302420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520 (or 518 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 20302420 is about 4505.8206799650. The cubic root of 20302420 is about 272.8030800041.

Adding to 20302420 its reverse (2420302), we get a palindrome (22722722).

The spelling of 20302420 in words is "twenty million, three hundred two thousand, four hundred twenty".