13603505242 has 4 divisors (see below), whose sum is σ = 20405257866. Its totient is φ = 6801752620.

The previous prime is 13603505233. The next prime is 13603505243. The reversal of 13603505242 is 24250530631.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12730834561 + 872670681 = 112831^2 + 29541^2 .

It is not an unprimeable number, because it can be changed into a prime (13603505243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3400876309 + ... + 3400876312.

Almost surely, 2^13603505242 is an apocalyptic number.

13603505242 is a deficient number, since it is larger than the sum of its proper divisors (6801752624).

13603505242 is an equidigital number, since it uses as much as digits as its factorization.

13603505242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6801752623.

The product of its (nonzero) digits is 21600, while the sum is 31.

The spelling of 13603505242 in words is "thirteen billion, six hundred three million, five hundred five thousand, two hundred forty-two".