2020404040400 has 60 divisors (see below), whose sum is σ = 4902080416044. Its totient is φ = 800160000000.

The previous prime is 2020404040399. The next prime is 2020404040409. The reversal of 2020404040400 is 40404040202.

It can be written as a sum of positive squares in 6 ways, for example, as 115529290816 + 1904874749584 = 339896^2 + 1380172^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020404040409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24964601 + ... + 25045400.

Almost surely, 2^{2020404040400} is an apocalyptic number.

2020404040400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2020404040400 is an abundant number, since it is smaller than the sum of its proper divisors (2881676375644).

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

2020404040400 is a wasteful number, since it uses less digits than its factorization.

2020404040400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50010120 (or 50010109 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 2020404040400 its reverse (40404040202), we get a palindrome (2060808080602).

The spelling of 2020404040400 in words is "two trillion, twenty billion, four hundred four million, forty thousand, four hundred".