20207404 has 18 divisors (see below), whose sum is σ = 41136900. Its totient is φ = 8660232.

The previous prime is 20207389. The next prime is 20207417. The reversal of 20207404 is 40470202.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51354 + ... + 51745.

Almost surely, 2^20207404 is an apocalyptic number.

It is an amenable number.

20207404 is an abundant number, since it is smaller than the sum of its proper divisors (20929496).

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

20207404 is a wasteful number, since it uses less digits than its factorization.

20207404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103117 (or 103108 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 20207404 is about 4495.2646195747. The cubic root of 20207404 is about 272.3768385441.

Adding to 20207404 its reverse (40470202), we get a palindrome (60677606).

The spelling of 20207404 in words is "twenty million, two hundred seven thousand, four hundred four".