20040220443420 has 72 divisors (see below), whose sum is σ = 60851273399280. Its totient is φ = 5338555073280.

The previous prime is 20040220443409. The next prime is 20040220443499. The reversal of 20040220443420 is 2434402204002.

20040220443420 is a `hidden beast` number, since 2 + 0 + 0 + 4 + 0 + 2 + 204 + 434 + 20 = 666.

It is a super-2 number, since 2×20040220443420² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57155065 + ... + 57504624.

It is an arithmetic number, because the mean of its divisors is an integer number (845156574990).

Almost surely, 2^{20040220443420} is an apocalyptic number.

20040220443420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20040220443420 is an abundant number, since it is smaller than the sum of its proper divisors (40811052955860).

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

20040220443420 is a wasteful number, since it uses less digits than its factorization.

20040220443420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114660675 (or 114660670 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

Adding to 20040220443420 its reverse (2434402204002), we get a palindrome (22474622647422).

The spelling of 20040220443420 in words is "twenty trillion, forty billion, two hundred twenty million, four hundred forty-three thousand, four hundred twenty".