13621031205 has 8 divisors (see below), whose sum is σ = 21793649952. Its totient is φ = 7264549968.

The previous prime is 13621031161. The next prime is 13621031209. The reversal of 13621031205 is 50213012631.

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

It is not a de Polignac number, because 13621031205 - 2¹² = 13621027109 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13621031209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 454034359 + ... + 454034388.

It is an arithmetic number, because the mean of its divisors is an integer number (2724206244).

Almost surely, 2^13621031205 is an apocalyptic number.

13621031205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13621031205 is a deficient number, since it is larger than the sum of its proper divisors (8172618747).

13621031205 is an equidigital number, since it uses as much as digits as its factorization.

13621031205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908068755.

The product of its (nonzero) digits is 1080, while the sum is 24.

Adding to 13621031205 its reverse (50213012631), we get a palindrome (63834043836).

The spelling of 13621031205 in words is "thirteen billion, six hundred twenty-one million, thirty-one thousand, two hundred five".