13018738 has 8 divisors (see below), whose sum is σ = 20201580. Its totient is φ = 6284880.

The previous prime is 13018727. The next prime is 13018739. The reversal of 13018738 is 83781031.

13018738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12510369 + 508369 = 3537^2 + 713^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×13018738² = 338975078225288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13018739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112173 + ... + 112288.

Almost surely, 2^13018738 is an apocalyptic number.

13018738 is a deficient number, since it is larger than the sum of its proper divisors (7182842).

13018738 is a wasteful number, since it uses less digits than its factorization.

13018738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224492.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 13018738 is about 3608.1488328504. The cubic root of 13018738 is about 235.2463871247.

Adding to 13018738 its reverse (83781031), we get a palindrome (96799769).

It can be divided in two parts, 1301873 and 8, that added together give a square (1301881 = 1141²).

The spelling of 13018738 in words is "thirteen million, eighteen thousand, seven hundred thirty-eight".