20461120361154 has 288 divisors, whose sum is σ = 51891475341888. Its totient is φ = 5802204672000.

The previous prime is 20461120361147. The next prime is 20461120361191. The reversal of 20461120361154 is 45116302116402.

20461120361154 is a `hidden beast` number, since 2 + 0 + 4 + 6 + 11 + 20 + 3 + 611 + 5 + 4 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 10094286289 + ... + 10094288315.

It is an arithmetic number, because the mean of its divisors is an integer number (180178733826).

Almost surely, 2^{20461120361154} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20461120361154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25945737670944).

20461120361154 is an abundant number, since it is smaller than the sum of its proper divisors (31430354980734).

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

20461120361154 is a wasteful number, since it uses less digits than its factorization.

20461120361154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3502 (or 3488 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

Adding to 20461120361154 its reverse (45116302116402), we get a palindrome (65577422477556).

The spelling of 20461120361154 in words is "twenty trillion, four hundred sixty-one billion, one hundred twenty million, three hundred sixty-one thousand, one hundred fifty-four".