20404413132331 has 16 divisors (see below), whose sum is σ = 22219654039200. Its totient is φ = 18663346211328.

The previous prime is 20404413132269. The next prime is 20404413132343. The reversal of 20404413132331 is 13323131440402.

It is a cyclic number.

It is not a de Polignac number, because 20404413132331 - 2⁷ = 20404413132203 is a prime.

It is a super-2 number, since 2×20404413132331² (a number of 27 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 = 20404413132293 and 20404413132302.

It is not an unprimeable number, because it can be changed into a prime (20404413132361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17642931 + ... + 18763843.

It is an arithmetic number, because the mean of its divisors is an integer number (1388728377450).

Almost surely, 2^{20404413132331} is an apocalyptic number.

20404413132331 is a deficient number, since it is larger than the sum of its proper divisors (1815240906869).

20404413132331 is a wasteful number, since it uses less digits than its factorization.

20404413132331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153998.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 20404413132331 its reverse (13323131440402), we get a palindrome (33727544572733).

The spelling of 20404413132331 in words is "twenty trillion, four hundred four billion, four hundred thirteen million, one hundred thirty-two thousand, three hundred thirty-one".