20402440041 has 16 divisors (see below), whose sum is σ = 27464184000. Its totient is φ = 13471265088.

The previous prime is 20402439997. The next prime is 20402440067. The reversal of 20402440041 is 14004420402.

It is not a de Polignac number, because 20402440041 - 2¹⁹ = 20401915753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20402440241) 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 15 ways as a sum of consecutive naturals, for example, 871015 + ... + 894131.

It is an arithmetic number, because the mean of its divisors is an integer number (1716511500).

Almost surely, 2^20402440041 is an apocalyptic number.

It is an amenable number.

20402440041 is a deficient number, since it is larger than the sum of its proper divisors (7061743959).

20402440041 is a wasteful number, since it uses less digits than its factorization.

20402440041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25928.

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 20402440041 its reverse (14004420402), we get a palindrome (34406860443).

The spelling of 20402440041 in words is "twenty billion, four hundred two million, four hundred forty thousand, forty-one".