20400413143205 has 8 divisors (see below), whose sum is σ = 24485015002392. Its totient is φ = 16317317694208.

The previous prime is 20400413143183. The next prime is 20400413143211. The reversal of 20400413143205 is 50234131400402.

It can be written as a sum of positive squares in 4 ways, for example, as 1906302114721 + 18494111028484 = 1380689^2 + 4300478^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20400413143205 - 2¹⁰ = 20400413142181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376572752 + ... + 376626921.

It is an arithmetic number, because the mean of its divisors is an integer number (3060626875299).

Almost surely, 2^{20400413143205} is an apocalyptic number.

It is an amenable number.

20400413143205 is a deficient number, since it is larger than the sum of its proper divisors (4084601859187).

20400413143205 is an equidigital number, since it uses as much as digits as its factorization.

20400413143205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753205095.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 20400413143205 its reverse (50234131400402), we get a palindrome (70634544543607).

The spelling of 20400413143205 in words is "twenty trillion, four hundred billion, four hundred thirteen million, one hundred forty-three thousand, two hundred five".