20404204001 has 8 divisors (see below), whose sum is σ = 21141121704. Its totient is φ = 19677047040.

The previous prime is 20404203983. The next prime is 20404204019. The reversal of 20404204001 is 10040240402.

It is an interprime number because it is at equal distance from previous prime (20404203983) and next prime (20404204019).

It can be written as a sum of positive squares in 4 ways, for example, as 4103043025 + 16301160976 = 64055^2 + 127676^2 .

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 20404204001 - 2²² = 20400009697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20404204091) 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, 2435930 + ... + 2444291.

It is an arithmetic number, because the mean of its divisors is an integer number (2642640213).

Almost surely, 2^20404204001 is an apocalyptic number.

It is an amenable number.

20404204001 is a deficient number, since it is larger than the sum of its proper divisors (736917703).

20404204001 is a wasteful number, since it uses less digits than its factorization.

20404204001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4880371.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 20404204001 its reverse (10040240402), we get a palindrome (30444444403).

The spelling of 20404204001 in words is "twenty billion, four hundred four million, two hundred four thousand, one".