20404421041024 has 64 divisors (see below), whose sum is σ = 42876025257600. Its totient is φ = 9645566676480.

The previous prime is 20404421041019. The next prime is 20404421041027. The reversal of 20404421041024 is 42014012440402.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 20404421040983 and 20404421041001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404421041027) 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, 7349652 + ... + 9737875.

It is an arithmetic number, because the mean of its divisors is an integer number (669937894650).

Almost surely, 2^{20404421041024} is an apocalyptic number.

It is an amenable number.

20404421041024 is an abundant number, since it is smaller than the sum of its proper divisors (22471604216576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20404421041024 is a wasteful number, since it uses less digits than its factorization.

20404421041024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17088051 (or 17088039 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 20404421041024 its reverse (42014012440402), we get a palindrome (62418433481426).

The spelling of 20404421041024 in words is "twenty trillion, four hundred four billion, four hundred twenty-one million, forty-one thousand, twenty-four".