20020404420400 has 120 divisors (see below), whose sum is σ = 48427791610464. Its totient is φ = 7953504614400.

The previous prime is 20020404420383. The next prime is 20020404420413. The reversal of 20020404420400 is 402440402002.

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, 79566790 + ... + 79818010.

Almost surely, 2^{20020404420400} is an apocalyptic number.

20020404420400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20020404420400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24213895805232).

20020404420400 is an abundant number, since it is smaller than the sum of its proper divisors (28407387190064).

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

20020404420400 is a wasteful number, since it uses less digits than its factorization.

20020404420400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252599 (or 252588 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 20020404420400 its reverse (402440402002), we get a palindrome (20422844822402).

The spelling of 20020404420400 in words is "twenty trillion, twenty billion, four hundred four million, four hundred twenty thousand, four hundred".