20003440401 has 64 divisors (see below), whose sum is σ = 34998845440. Its totient is φ = 11049773760.

The previous prime is 20003440397. The next prime is 20003440421. The reversal of 20003440401 is 10404430002.

It is not a de Polignac number, because 20003440401 - 2² = 20003440397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20003440421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9742491 + ... + 9744543.

It is an arithmetic number, because the mean of its divisors is an integer number (546856960).

Almost surely, 2^20003440401 is an apocalyptic number.

20003440401 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20003440401 is a deficient number, since it is larger than the sum of its proper divisors (14995405039).

20003440401 is a wasteful number, since it uses less digits than its factorization.

20003440401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3763 (or 3757 counting only the distinct ones).

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

Adding to 20003440401 its reverse (10404430002), we get a palindrome (30407870403).

The spelling of 20003440401 in words is "twenty billion, three million, four hundred forty thousand, four hundred one".