20204012100040 has 16 divisors (see below), whose sum is σ = 45459027225180. Its totient is φ = 8081604840000.

The previous prime is 20204012100011. The next prime is 20204012100049. The reversal of 20204012100040 is 4000121040202.

It can be written as a sum of positive squares in 2 ways, for example, as 18690871010436 + 1513141089604 = 4323294^2 + 1230098^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20204012099987 and 20204012100023.

It is not an unprimeable number, because it can be changed into a prime (20204012100049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252550151211 + ... + 252550151290.

Almost surely, 2^{20204012100040} is an apocalyptic number.

20204012100040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20204012100040 is an abundant number, since it is smaller than the sum of its proper divisors (25255015125140).

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

20204012100040 is a wasteful number, since it uses less digits than its factorization.

20204012100040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505100302512 (or 505100302508 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20204012100040 its reverse (4000121040202), we get a palindrome (24204133140242).

The spelling of 20204012100040 in words is "twenty trillion, two hundred four billion, twelve million, one hundred thousand, forty".