20413223121 has 16 divisors (see below), whose sum is σ = 27958089600. Its totient is φ = 13238713728.

The previous prime is 20413223119. The next prime is 20413223141. The reversal of 20413223121 is 12132231402.

It is not a de Polignac number, because 20413223121 - 2¹ = 20413223119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20413223141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 826885 + ... + 851213.

It is an arithmetic number, because the mean of its divisors is an integer number (1747380600).

Almost surely, 2^20413223121 is an apocalyptic number.

It is an amenable number.

20413223121 is a deficient number, since it is larger than the sum of its proper divisors (7544866479).

20413223121 is a wasteful number, since it uses less digits than its factorization.

20413223121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31928.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20413223121 its reverse (12132231402), we get a palindrome (32545454523).

The spelling of 20413223121 in words is "twenty billion, four hundred thirteen million, two hundred twenty-three thousand, one hundred twenty-one".