804402240020 has 24 divisors (see below), whose sum is σ = 1690798792704. Its totient is φ = 321464879136.

The previous prime is 804402239969. The next prime is 804402240023. The reversal of 804402240020 is 20042204408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (804402240023) 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 7 ways as a sum of consecutive naturals, for example, 18478772 + ... + 18522251.

It is an arithmetic number, because the mean of its divisors is an integer number (70449949696).

Almost surely, 2^804402240020 is an apocalyptic number.

It is an amenable number.

804402240020 is an abundant number, since it is smaller than the sum of its proper divisors (886396552684).

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

804402240020 is a wasteful number, since it uses less digits than its factorization.

804402240020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37002119 (or 37002117 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 804402240020 its reverse (20042204408), we get a palindrome (824444444428).

The spelling of 804402240020 in words is "eight hundred four billion, four hundred two million, two hundred forty thousand, twenty".