20413444 has 12 divisors (see below), whose sum is σ = 35790300. Its totient is φ = 10187648.

The previous prime is 20413441. The next prime is 20413451. The reversal of 20413444 is 44431402.

It can be written as a sum of positive squares in 2 ways, for example, as 6812100 + 13601344 = 2610^2 + 3688^2 .

It is a super-2 number, since 2×20413444² = 833417391882272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20413441) 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, 2209 + ... + 6760.

It is an arithmetic number, because the mean of its divisors is an integer number (2982525).

Almost surely, 2^20413444 is an apocalyptic number.

It is an amenable number.

20413444 is a deficient number, since it is larger than the sum of its proper divisors (15376856).

20413444 is a wasteful number, since it uses less digits than its factorization.

20413444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9542 (or 9540 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 20413444 is about 4518.1239469497. The cubic root of 20413444 is about 273.2994518120.

Adding to 20413444 its reverse (44431402), we get a palindrome (64844846).

The spelling of 20413444 in words is "twenty million, four hundred thirteen thousand, four hundred forty-four".