20413404 has 48 divisors (see below), whose sum is σ = 57738240. Its totient is φ = 6185520.

The previous prime is 20413403. The next prime is 20413409. The reversal of 20413404 is 40431402.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20413403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7404 + ... + 9779.

It is an arithmetic number, because the mean of its divisors is an integer number (1202880).

Almost surely, 2^20413404 is an apocalyptic number.

It is an amenable number.

20413404 is an abundant number, since it is smaller than the sum of its proper divisors (37324836).

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

20413404 is a wasteful number, since it uses less digits than its factorization.

20413404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17207 (or 17199 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 20413404 is about 4518.1195203314. The cubic root of 20413404 is about 273.2992733024.

Adding to 20413404 its reverse (40431402), we get a palindrome (60844806).

It can be divided in two parts, 2041 and 3404, that added together give a palindrome (5445).

The spelling of 20413404 in words is "twenty million, four hundred thirteen thousand, four hundred four".