20041005401 has 4 divisors (see below), whose sum is σ = 20094735012. Its totient is φ = 19987275792.

The previous prime is 20041005371. The next prime is 20041005409. The reversal of 20041005401 is 10450014002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9784177225 + 10256828176 = 98915^2 + 101276^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20041005401 is a prime.

It is a super-2 number, since 2×20041005401² (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 20041005401.

It is not an unprimeable number, because it can be changed into a prime (20041005409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26864246 + ... + 26864991.

It is an arithmetic number, because the mean of its divisors is an integer number (5023683753).

Almost surely, 2^20041005401 is an apocalyptic number.

It is an amenable number.

20041005401 is a deficient number, since it is larger than the sum of its proper divisors (53729611).

20041005401 is an equidigital number, since it uses as much as digits as its factorization.

20041005401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53729610.

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 20041005401 its reverse (10450014002), we get a palindrome (30491019403).

The spelling of 20041005401 in words is "twenty billion, forty-one million, five thousand, four hundred one".