20002040400004 has 24 divisors (see below), whose sum is σ = 37765831770968. Its totient is φ = 9214646780160.

The previous prime is 20002040399989. The next prime is 20002040400103. The reversal of 20002040400004 is 40000404020002.

It can be written as a sum of positive squares in 4 ways, for example, as 1729493270404 + 18272547129600 = 1315102^2 + 4274640^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355475217 + ... + 355531480.

Almost surely, 2^{20002040400004} is an apocalyptic number.

It is an amenable number.

20002040400004 is a deficient number, since it is larger than the sum of its proper divisors (17763791370964).

20002040400004 is a wasteful number, since it uses less digits than its factorization.

20002040400004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711007255 (or 711007253 counting only the distinct ones).

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

Adding to 20002040400004 its reverse (40000404020002), we get a palindrome (60002444420006).

The spelling of 20002040400004 in words is "twenty trillion, two billion, forty million, four hundred thousand, four".