20413404331 has 4 divisors (see below), whose sum is σ = 20447370664. Its totient is φ = 20379438000.

The previous prime is 20413404301. The next prime is 20413404343. The reversal of 20413404331 is 13340431402.

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

It is a cyclic number.

It is not a de Polignac number, because 20413404331 - 2⁹ = 20413403819 is a prime.

It is a super-2 number, since 2×20413404331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20413404296 and 20413404305.

It is not an unprimeable number, because it can be changed into a prime (20413404301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16982265 + ... + 16983466.

It is an arithmetic number, because the mean of its divisors is an integer number (5111842666).

Almost surely, 2^20413404331 is an apocalyptic number.

20413404331 is a deficient number, since it is larger than the sum of its proper divisors (33966333).

20413404331 is an equidigital number, since it uses as much as digits as its factorization.

20413404331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33966332.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 20413404331 its reverse (13340431402), we get a palindrome (33753835733).

The spelling of 20413404331 in words is "twenty billion, four hundred thirteen million, four hundred four thousand, three hundred thirty-one".