20115542555554 has 24 divisors (see below), whose sum is σ = 31689160032924. Its totient is φ = 9573764248800.

The previous prime is 20115542555551. The next prime is 20115542555561. The reversal of 20115542555554 is 45555524551102.

It can be written as a sum of positive squares in 2 ways, for example, as 12763435034025 + 7352107521529 = 3572595^2 + 2711477^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20115542555498 and 20115542555507.

It is not an unprimeable number, because it can be changed into a prime (20115542555551) 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, 85669177 + ... + 85903660.

Almost surely, 2^{20115542555554} is an apocalyptic number.

20115542555554 is a deficient number, since it is larger than the sum of its proper divisors (11573617477370).

20115542555554 is a wasteful number, since it uses less digits than its factorization.

20115542555554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171572962 (or 171572931 counting only the distinct ones).

The product of its (nonzero) digits is 5000000, while the sum is 49.

The spelling of 20115542555554 in words is "twenty trillion, one hundred fifteen billion, five hundred forty-two million, five hundred fifty-five thousand, five hundred fifty-four".