20043012401 has 4 divisors (see below), whose sum is σ = 20531866404. Its totient is φ = 19554158400.

The previous prime is 20043012377. The next prime is 20043012403. The reversal of 20043012401 is 10421034002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10421034002 = 2 ⋅5210517001.

It can be written as a sum of positive squares in 2 ways, for example, as 2230106176 + 17812906225 = 47224^2 + 133465^2 .

It is a cyclic number.

It is not a de Polignac number, because 20043012401 - 2¹⁸ = 20042750257 is a prime.

It is a super-2 number, since 2×20043012401² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20043012401.

It is not an unprimeable number, because it can be changed into a prime (20043012403) 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, 244426940 + ... + 244427021.

It is an arithmetic number, because the mean of its divisors is an integer number (5132966601).

Almost surely, 2^20043012401 is an apocalyptic number.

It is an amenable number.

20043012401 is a deficient number, since it is larger than the sum of its proper divisors (488854003).

20043012401 is an equidigital number, since it uses as much as digits as its factorization.

20043012401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488854002.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20043012401 its reverse (10421034002), we get a palindrome (30464046403).

The spelling of 20043012401 in words is "twenty billion, forty-three million, twelve thousand, four hundred one".