220021134243444 has 36 divisors (see below), whose sum is σ = 556170745049920. Its totient is φ = 73339559012880.

The previous prime is 220021134243413. The next prime is 220021134243479. The reversal of 220021134243444 is 444342431120022.

220021134243444 is a `hidden beast` number, since 2 + 2 + 0 + 0 + 211 + 3 + 4 + 2 + 434 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×220021134243444² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 220021134243399 and 220021134243408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30855292 + ... + 37310739.

Almost surely, 2^{220021134243444} is an apocalyptic number.

It is an amenable number.

220021134243444 is an abundant number, since it is smaller than the sum of its proper divisors (336149610806476).

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

220021134243444 is a wasteful number, since it uses less digits than its factorization.

220021134243444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68255700 (or 68255695 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 36.

Adding to 220021134243444 its reverse (444342431120022), we get a palindrome (664363565363466).

The spelling of 220021134243444 in words is "two hundred twenty trillion, twenty-one billion, one hundred thirty-four million, two hundred forty-three thousand, four hundred forty-four".