20002220444400 has 120 divisors (see below), whose sum is σ = 64074796224384. Its totient is φ = 5333840812800.

The previous prime is 20002220444383. The next prime is 20002220444411. The reversal of 20002220444400 is 444402220002.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124228747 + ... + 124389653.

Almost surely, 2^{20002220444400} is an apocalyptic number.

20002220444400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002220444400 is an abundant number, since it is smaller than the sum of its proper divisors (44072575779984).

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

20002220444400 is a wasteful number, since it uses less digits than its factorization.

20002220444400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264519 (or 264508 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 20002220444400 its reverse (444402220002), we get a palindrome (20446622664402).

The spelling of 20002220444400 in words is "twenty trillion, two billion, two hundred twenty million, four hundred forty-four thousand, four hundred".