13318738 has 4 divisors (see below), whose sum is σ = 19978110. Its totient is φ = 6659368.

The previous prime is 13318709. The next prime is 13318757. The reversal of 13318738 is 83781331.

13318738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83781331 = 401 ⋅208931.

It can be written as a sum of positive squares in only one way, i.e., 10067929 + 3250809 = 3173^2 + 1803^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3329683 + ... + 3329686.

Almost surely, 2^13318738 is an apocalyptic number.

13318738 is a deficient number, since it is larger than the sum of its proper divisors (6659372).

13318738 is an equidigital number, since it uses as much as digits as its factorization.

13318738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6659371.

The product of its digits is 12096, while the sum is 34.

The square root of 13318738 is about 3649.4846211486. The cubic root of 13318738 is about 237.0396653035.

It can be divided in two parts, 133187 and 38, that added together give a square (133225 = 365²).

The spelling of 13318738 in words is "thirteen million, three hundred eighteen thousand, seven hundred thirty-eight".