20413223215145 has 32 divisors (see below), whose sum is σ = 26489613047040. Its totient is φ = 15044600289280.

The previous prime is 20413223215093. The next prime is 20413223215201. The reversal of 20413223215145 is 54151232231402.

It is not a de Polignac number, because 20413223215145 - 2⁶ = 20413223215081 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7566341 + ... + 9903330.

It is an arithmetic number, because the mean of its divisors is an integer number (827800407720).

Almost surely, 2^{20413223215145} is an apocalyptic number.

It is an amenable number.

20413223215145 is a deficient number, since it is larger than the sum of its proper divisors (6076389831895).

20413223215145 is a wasteful number, since it uses less digits than its factorization.

20413223215145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17469985.

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 20413223215145 its reverse (54151232231402), we get a palindrome (74564455446547).

The spelling of 20413223215145 in words is "twenty trillion, four hundred thirteen billion, two hundred twenty-three million, two hundred fifteen thousand, one hundred forty-five".