20404243220201 has 8 divisors (see below), whose sum is σ = 20606446153800. Its totient is φ = 20202043830400.

The previous prime is 20404243220191. The next prime is 20404243220239. The reversal of 20404243220201 is 10202234240402.

It can be written as a sum of positive squares in 4 ways, for example, as 12896889818176 + 7507353402025 = 3591224^2 + 2739955^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20404243220201 - 2²⁶ = 20404176111337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20404243223201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11546735 + ... + 13196043.

It is an arithmetic number, because the mean of its divisors is an integer number (2575805769225).

Almost surely, 2^{20404243220201} is an apocalyptic number.

It is an amenable number.

20404243220201 is a deficient number, since it is larger than the sum of its proper divisors (202202933599).

20404243220201 is a wasteful number, since it uses less digits than its factorization.

20404243220201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771899.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 20404243220201 its reverse (10202234240402), we get a palindrome (30606477460603).

It can be divided in two parts, 2040424 and 3220201, that added together give a palindrome (5260625).

The spelling of 20404243220201 in words is "twenty trillion, four hundred four billion, two hundred forty-three million, two hundred twenty thousand, two hundred one".