20030446 has 12 divisors (see below), whose sum is σ = 31711392. Its totient is φ = 9487764.

The previous prime is 20030443. The next prime is 20030453. The reversal of 20030446 is 64403002.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20030443) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13150 + ... + 14593.

It is an arithmetic number, because the mean of its divisors is an integer number (2642616).

Almost surely, 2^20030446 is an apocalyptic number.

20030446 is a deficient number, since it is larger than the sum of its proper divisors (11680946).

20030446 is a wasteful number, since it uses less digits than its factorization.

20030446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27783 (or 27764 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 20030446 is about 4475.5386268024. The cubic root of 20030446 is about 271.5794304233.

Adding to 20030446 its reverse (64403002), we get a palindrome (84433448).

The spelling of 20030446 in words is "twenty million, thirty thousand, four hundred forty-six".