20461120361155 has 4 divisors (see below), whose sum is σ = 24553344433392. Its totient is φ = 16368896288920.

The previous prime is 20461120361147. The next prime is 20461120361191. The reversal of 20461120361155 is 55116302116402.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20461120361155 - 2³ = 20461120361147 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2046112036111 + ... + 2046112036120.

It is an arithmetic number, because the mean of its divisors is an integer number (6138336108348).

Almost surely, 2^{20461120361155} is an apocalyptic number.

20461120361155 is a deficient number, since it is larger than the sum of its proper divisors (4092224072237).

20461120361155 is an equidigital number, since it uses as much as digits as its factorization.

20461120361155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4092224072236.

The product of its (nonzero) digits is 43200, while the sum is 37.

Adding to 20461120361155 its reverse (55116302116402), we get a palindrome (75577422477557).

The spelling of 20461120361155 in words is "twenty trillion, four hundred sixty-one billion, one hundred twenty million, three hundred sixty-one thousand, one hundred fifty-five".