20030004 has 42 divisors (see below), whose sum is σ = 52562370. Its totient is φ = 6675696.

The previous prime is 20029993. The next prime is 20030011. The reversal of 20030004 is 40003002.

It can be written as a sum of positive squares in only one way, i.e., 11209104 + 8820900 = 3348^2 + 2970^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 519 + ... + 6350.

It is an arithmetic number, because the mean of its divisors is an integer number (1251485).

Almost surely, 2^20030004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20030004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26281185).

20030004 is an abundant number, since it is smaller than the sum of its proper divisors (32532366).

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

20030004 is an equidigital number, since it uses as much as digits as its factorization.

20030004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6891 (or 6874 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 9.

The square root of 20030004 is about 4475.4892469986. The cubic root of 20030004 is about 271.5774328144.

Adding to 20030004 its reverse (40003002), we get a palindrome (60033006).

The spelling of 20030004 in words is "twenty million, thirty thousand, four".