13105523402 has 12 divisors (see below), whose sum is σ = 20126092050. Its totient is φ = 6400370088.

The previous prime is 13105523401. The next prime is 13105523419. The reversal of 13105523402 is 20432550131.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6865945321 + 6239578081 = 82861^2 + 78991^2 .

It is not an unprimeable number, because it can be changed into a prime (13105523401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1768277 + ... + 1775672.

Almost surely, 2^13105523402 is an apocalyptic number.

13105523402 is a deficient number, since it is larger than the sum of its proper divisors (7020568648).

13105523402 is an equidigital number, since it uses as much as digits as its factorization.

13105523402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3544037 (or 3543994 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 13105523402 in words is "thirteen billion, one hundred five million, five hundred twenty-three thousand, four hundred two".