17813012738 has 4 divisors (see below), whose sum is σ = 26719519110. Its totient is φ = 8906506368.

The previous prime is 17813012683. The next prime is 17813012747. The reversal of 17813012738 is 83721031871.

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., 17704165249 + 108847489 = 133057^2 + 10433^2 .

It is a junction number, because it is equal to n+sod(n) for n = 17813012695 and 17813012704.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4453253183 + ... + 4453253186.

Almost surely, 2^17813012738 is an apocalyptic number.

17813012738 is a deficient number, since it is larger than the sum of its proper divisors (8906506372).

17813012738 is an equidigital number, since it uses as much as digits as its factorization.

17813012738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8906506371.

The product of its (nonzero) digits is 56448, while the sum is 41.

The spelling of 17813012738 in words is "seventeen billion, eight hundred thirteen million, twelve thousand, seven hundred thirty-eight".