20413412321 has 4 divisors (see below), whose sum is σ = 20430610992. Its totient is φ = 20396213652.

The previous prime is 20413412309. The next prime is 20413412323. The reversal of 20413412321 is 12321431402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20413412321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20413412323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8597555 + ... + 8599928.

It is an arithmetic number, because the mean of its divisors is an integer number (5107652748).

Almost surely, 2^20413412321 is an apocalyptic number.

It is an amenable number.

20413412321 is a deficient number, since it is larger than the sum of its proper divisors (17198671).

20413412321 is a wasteful number, since it uses less digits than its factorization.

20413412321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17198670.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 20413412321 its reverse (12321431402), we get a palindrome (32734843723).

The spelling of 20413412321 in words is "twenty billion, four hundred thirteen million, four hundred twelve thousand, three hundred twenty-one".