13198423138 has 4 divisors (see below), whose sum is σ = 19797634710. Its totient is φ = 6599211568.

The previous prime is 13198423067. The next prime is 13198423163. The reversal of 13198423138 is 83132489131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83132489131 = 79 ⋅1052309989.

It can be written as a sum of positive squares in only one way, i.e., 13123306249 + 75116889 = 114557^2 + 8667^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13198423094 and 13198423103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3299605783 + ... + 3299605786.

Almost surely, 2^13198423138 is an apocalyptic number.

13198423138 is a deficient number, since it is larger than the sum of its proper divisors (6599211572).

13198423138 is an equidigital number, since it uses as much as digits as its factorization.

13198423138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6599211571.

The product of its digits is 124416, while the sum is 43.

The spelling of 13198423138 in words is "thirteen billion, one hundred ninety-eight million, four hundred twenty-three thousand, one hundred thirty-eight".