20427030 has 144 divisors (see below), whose sum is σ = 61663680. Its totient is φ = 4672512.

The previous prime is 20427007. The next prime is 20427031. The reversal of 20427030 is 3072402.

It is a happy number.

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 = 20426994 and 20427012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20427031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 258531 + ... + 258609.

It is an arithmetic number, because the mean of its divisors is an integer number (428220).

Almost surely, 2^20427030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20427030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30831840).

20427030 is an abundant number, since it is smaller than the sum of its proper divisors (41236650).

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

20427030 is a wasteful number, since it uses less digits than its factorization.

20427030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 20427030 is about 4519.6271970153. The cubic root of 20427030 is about 273.3600691014.

Adding to 20427030 its reverse (3072402), we get a palindrome (23499432).

The spelling of 20427030 in words is "twenty million, four hundred twenty-seven thousand, thirty".