13603134638 has 4 divisors (see below), whose sum is σ = 20404701960. Its totient is φ = 6801567318.

The previous prime is 13603134637. The next prime is 13603134673. The reversal of 13603134638 is 83643130631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83643130631 = 1319 ⋅63414049.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13603134637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3400783658 + ... + 3400783661.

It is an arithmetic number, because the mean of its divisors is an integer number (5101175490).

Almost surely, 2^13603134638 is an apocalyptic number.

13603134638 is a deficient number, since it is larger than the sum of its proper divisors (6801567322).

13603134638 is an equidigital number, since it uses as much as digits as its factorization.

13603134638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6801567321.

The product of its (nonzero) digits is 93312, while the sum is 38.

The spelling of 13603134638 in words is "thirteen billion, six hundred three million, one hundred thirty-four thousand, six hundred thirty-eight".