20004242402420 has 12 divisors (see below), whose sum is σ = 42008909045124. Its totient is φ = 8001696960960.

The previous prime is 20004242402411. The next prime is 20004242402447. The reversal of 20004242402420 is 2420424240002.

It can be written as a sum of positive squares in 2 ways, for example, as 7751246219236 + 12252996183184 = 2784106^2 + 3500428^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20004242402420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500106060041 + ... + 500106060080.

It is an arithmetic number, because the mean of its divisors is an integer number (3500742420427).

Almost surely, 2^{20004242402420} is an apocalyptic number.

20004242402420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20004242402420 is an abundant number, since it is smaller than the sum of its proper divisors (22004666642704).

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

20004242402420 is a wasteful number, since it uses less digits than its factorization.

20004242402420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000212120130 (or 1000212120128 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 20004242402420 its reverse (2420424240002), we get a palindrome (22424666642422).

The spelling of 20004242402420 in words is "twenty trillion, four billion, two hundred forty-two million, four hundred two thousand, four hundred twenty".