13020405555 has 8 divisors (see below), whose sum is σ = 20832648912. Its totient is φ = 6944216288.

The previous prime is 13020405533. The next prime is 13020405589. The reversal of 13020405555 is 55550402031.

It is a happy number.

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 13020405555 - 2⁵ = 13020405523 is a prime.

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, 434013504 + ... + 434013533.

It is an arithmetic number, because the mean of its divisors is an integer number (2604081114).

Almost surely, 2^13020405555 is an apocalyptic number.

13020405555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13020405555 is a deficient number, since it is larger than the sum of its proper divisors (7812243357).

13020405555 is an equidigital number, since it uses as much as digits as its factorization.

13020405555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868027045.

The product of its (nonzero) digits is 15000, while the sum is 30.

Adding to 13020405555 its reverse (55550402031), we get a palindrome (68570807586).

The spelling of 13020405555 in words is "thirteen billion, twenty million, four hundred five thousand, five hundred fifty-five".