20030406 has 16 divisors (see below), whose sum is σ = 43702848. Its totient is φ = 6069800.

The previous prime is 20030383. The next prime is 20030407. The reversal of 20030406 is 60403002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20030407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151680 + ... + 151811.

It is an arithmetic number, because the mean of its divisors is an integer number (2731428).

Almost surely, 2^20030406 is an apocalyptic number.

20030406 is an abundant number, since it is smaller than the sum of its proper divisors (23672442).

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

20030406 is a wasteful number, since it uses less digits than its factorization.

20030406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303507.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 20030406 is about 4475.5341580643. The cubic root of 20030406 is about 271.5792496454.

Adding to 20030406 its reverse (60403002), we get a palindrome (80433408).

The spelling of 20030406 in words is "twenty million, thirty thousand, four hundred six".