20420352 has 54 divisors (see below), whose sum is σ = 58883552. Its totient is φ = 6806016.

The previous prime is 20420347. The next prime is 20420357. The reversal of 20420352 is 25302402.

It is an interprime number because it is at equal distance from previous prime (20420347) and next prime (20420357).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420357) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 2128 + ... + 6735.

Almost surely, 2^20420352 is an apocalyptic number.

It is an amenable number.

20420352 is an abundant number, since it is smaller than the sum of its proper divisors (38463200).

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

20420352 is an equidigital number, since it uses as much as digits as its factorization.

20420352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8885 (or 8868 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 20420352 is about 4518.8883588777. Note that the first 3 decimals coincide. The cubic root of 20420352 is about 273.3302769174.

Adding to 20420352 its reverse (25302402), we get a palindrome (45722754).

The spelling of 20420352 in words is "twenty million, four hundred twenty thousand, three hundred fifty-two".