20413201321 has 4 divisors (see below), whose sum is σ = 20444752512. Its totient is φ = 20381650132.

The previous prime is 20413201313. The next prime is 20413201373. The reversal of 20413201321 is 12310231402.

It is a happy number.

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 not a de Polignac number, because 20413201321 - 2³ = 20413201313 is a prime.

It is a super-2 number, since 2×20413201321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20413201021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15774625 + ... + 15775918.

It is an arithmetic number, because the mean of its divisors is an integer number (5111188128).

Almost surely, 2^20413201321 is an apocalyptic number.

It is an amenable number.

20413201321 is a deficient number, since it is larger than the sum of its proper divisors (31551191).

20413201321 is an equidigital number, since it uses as much as digits as its factorization.

20413201321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31551190.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20413201321 its reverse (12310231402), we get a palindrome (32723432723).

The spelling of 20413201321 in words is "twenty billion, four hundred thirteen million, two hundred one thousand, three hundred twenty-one".