11423451218 has 4 divisors (see below), whose sum is σ = 17135176830. Its totient is φ = 5711725608.

The previous prime is 11423451217. The next prime is 11423451229. The reversal of 11423451218 is 81215432411.

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., 9110129809 + 2313321409 = 95447^2 + 48097^2 .

It is not an unprimeable number, because it can be changed into a prime (11423451217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2855862803 + ... + 2855862806.

Almost surely, 2^11423451218 is an apocalyptic number.

11423451218 is a deficient number, since it is larger than the sum of its proper divisors (5711725612).

11423451218 is an equidigital number, since it uses as much as digits as its factorization.

11423451218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5711725611.

The product of its digits is 7680, while the sum is 32.

Adding to 11423451218 its reverse (81215432411), we get a palindrome (92638883629).

The spelling of 11423451218 in words is "eleven billion, four hundred twenty-three million, four hundred fifty-one thousand, two hundred eighteen".