20310404 has 12 divisors (see below), whose sum is σ = 35647500. Its totient is φ = 10125408.

The previous prime is 20310401. The next prime is 20310463. The reversal of 20310404 is 40401302.

It can be written as a sum of positive squares in 2 ways, for example, as 15984004 + 4326400 = 3998^2 + 2080^2 .

It is not an unprimeable number, because it can be changed into a prime (20310401) 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, 5879 + ... + 8670.

It is an arithmetic number, because the mean of its divisors is an integer number (2970625).

Almost surely, 2^20310404 is an apocalyptic number.

It is an amenable number.

20310404 is a deficient number, since it is larger than the sum of its proper divisors (15337096).

20310404 is a wasteful number, since it uses less digits than its factorization.

20310404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14902 (or 14900 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20310404 is about 4506.7065580089. The cubic root of 20310404 is about 272.8388355830.

Adding to 20310404 its reverse (40401302), we get a palindrome (60711706).

The spelling of 20310404 in words is "twenty million, three hundred ten thousand, four hundred four".