20404004020000 has 60 divisors (see below), whose sum is σ = 50196910539006. Its totient is φ = 8161601600000.

The previous prime is 20404004019991. The next prime is 20404004020009. The reversal of 20404004020000 is 2040040402.

It is an interprime number because it is at equal distance from previous prime (20404004019991) and next prime (20404004020009).

It can be written as a sum of positive squares in 5 ways, for example, as 28430224 + 20403975589776 = 5332^2 + 4517076^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (20404004020009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 510080101 + ... + 510120100.

Almost surely, 2^{20404004020000} is an apocalyptic number.

20404004020000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20404004020000 is an abundant number, since it is smaller than the sum of its proper divisors (29792906519006).

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

20404004020000 is an equidigital number, since it uses as much as digits as its factorization.

20404004020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020200231 (or 1020200208 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 20404004020000 its reverse (2040040402), we get a palindrome (20406044060402).

The spelling of 20404004020000 in words is "twenty trillion, four hundred four billion, four million, twenty thousand".