20020402004 has 6 divisors (see below), whose sum is σ = 35035703514. Its totient is φ = 10010201000.

The previous prime is 20020401997. The next prime is 20020402007. The reversal of 20020402004 is 40020402002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19558581904 + 461820100 = 139852^2 + 21490^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20020402004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020402007) 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 as a sum of consecutive naturals, namely, 2502550247 + ... + 2502550254.

It is an arithmetic number, because the mean of its divisors is an integer number (5839283919).

Almost surely, 2^20020402004 is an apocalyptic number.

It is an amenable number.

20020402004 is a deficient number, since it is larger than the sum of its proper divisors (15015301510).

20020402004 is a wasteful number, since it uses less digits than its factorization.

20020402004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5005100505 (or 5005100503 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

Adding to 20020402004 its reverse (40020402002), we get a palindrome (60040804006).

The spelling of 20020402004 in words is "twenty billion, twenty million, four hundred two thousand, four".