20404011220220 has 24 divisors (see below), whose sum is σ = 45103603750800. Its totient is φ = 7732046356992.

The previous prime is 20404011220207. The next prime is 20404011220259. The reversal of 20404011220220 is 2202211040402.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20404011220192 and 20404011220201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26847382805 + ... + 26847383564.

It is an arithmetic number, because the mean of its divisors is an integer number (1879316822950).

Almost surely, 2^{20404011220220} is an apocalyptic number.

20404011220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20404011220220 is an abundant number, since it is smaller than the sum of its proper divisors (24699592530580).

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

20404011220220 is a wasteful number, since it uses less digits than its factorization.

20404011220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53694766397 (or 53694766395 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20404011220220 its reverse (2202211040402), we get a palindrome (22606222260622).

The spelling of 20404011220220 in words is "twenty trillion, four hundred four billion, eleven million, two hundred twenty thousand, two hundred twenty".