20403204 has 12 divisors (see below), whose sum is σ = 47607504. Its totient is φ = 6801064.

The previous prime is 20403197. The next prime is 20403221. The reversal of 20403204 is 40230402.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 850122 + ... + 850145.

It is an arithmetic number, because the mean of its divisors is an integer number (3967292).

Almost surely, 2^20403204 is an apocalyptic number.

It is an amenable number.

20403204 is an abundant number, since it is smaller than the sum of its proper divisors (27204300).

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

20403204 is a wasteful number, since it uses less digits than its factorization.

20403204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700274 (or 1700272 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 20403204 is about 4516.9905910905. The cubic root of 20403204 is about 273.2537457490.

Adding to 20403204 its reverse (40230402), we get a palindrome (60633606).

The spelling of 20403204 in words is "twenty million, four hundred three thousand, two hundred four".