20503004 has 12 divisors (see below), whose sum is σ = 35935200. Its totient is φ = 10235808.

The previous prime is 20503001. The next prime is 20503013. The reversal of 20503004 is 40030502.

It is a self number, because there is not a number n which added to its sum of digits gives 20503004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20503001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689 + ... + 6440.

It is an arithmetic number, because the mean of its divisors is an integer number (2994600).

Almost surely, 2^20503004 is an apocalyptic number.

It is an amenable number.

20503004 is a deficient number, since it is larger than the sum of its proper divisors (15432196).

20503004 is a wasteful number, since it uses less digits than its factorization.

20503004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7852 (or 7850 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 20503004 is about 4528.0242932211. The cubic root of 20503004 is about 273.6985513844.

Adding to 20503004 its reverse (40030502), we get a palindrome (60533506).

The spelling of 20503004 in words is "twenty million, five hundred three thousand, four".