20404244204220 has 48 divisors (see below), whose sum is σ = 57152636825760. Its totient is φ = 5439155306496.

The previous prime is 20404244204209. The next prime is 20404244204231. The reversal of 20404244204220 is 2240244240402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20404244204209) and next prime (20404244204231).

It is a super-2 number, since 2×20404244204220² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61598485 + ... + 61928844.

It is an arithmetic number, because the mean of its divisors is an integer number (1190679933870).

Almost surely, 2^{20404244204220} is an apocalyptic number.

20404244204220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20404244204220 is an abundant number, since it is smaller than the sum of its proper divisors (36748392621540).

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

20404244204220 is a wasteful number, since it uses less digits than its factorization.

20404244204220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123530094 (or 123530092 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 30.

Adding to 20404244204220 its reverse (2240244240402), we get a palindrome (22644488444622).

The spelling of 20404244204220 in words is "twenty trillion, four hundred four billion, two hundred forty-four million, two hundred four thousand, two hundred twenty".