20004401 has 4 divisors (see below), whose sum is σ = 20332404. Its totient is φ = 19676400.

The previous prime is 20004367. The next prime is 20004419. The reversal of 20004401 is 10440002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10440002 = 2 ⋅5220001.

It can be written as a sum of positive squares in 2 ways, for example, as 6754801 + 13249600 = 2599^2 + 3640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20004401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20004431) 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, 163910 + ... + 164031.

It is an arithmetic number, because the mean of its divisors is an integer number (5083101).

Almost surely, 2^20004401 is an apocalyptic number.

It is an amenable number.

20004401 is a deficient number, since it is larger than the sum of its proper divisors (328003).

20004401 is an equidigital number, since it uses as much as digits as its factorization.

20004401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328002.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 20004401 is about 4472.6279746923. The cubic root of 20004401 is about 271.4616704525.

Adding to 20004401 its reverse (10440002), we get a palindrome (30444403).

The spelling of 20004401 in words is "twenty million, four thousand, four hundred one".