20042550400100 has 18 divisors (see below), whose sum is σ = 43492334368434. Its totient is φ = 8017020160000.

The previous prime is 20042550400079. The next prime is 20042550400111. The reversal of 20042550400100 is 100405524002.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 5742838402084 + 14299711998016 = 2396422^2 + 3781496^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100212751901 + ... + 100212752100.

Almost surely, 2^{20042550400100} is an apocalyptic number.

20042550400100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20042550400100 is an abundant number, since it is smaller than the sum of its proper divisors (23449783968334).

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

20042550400100 is a wasteful number, since it uses less digits than its factorization.

20042550400100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200425504015 (or 200425504008 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

Adding to 20042550400100 its reverse (100405524002), we get a palindrome (20142955924102).

The spelling of 20042550400100 in words is "twenty trillion, forty-two billion, five hundred fifty million, four hundred thousand, one hundred".