11381018 has 24 divisors (see below), whose sum is σ = 18960480. Its totient is φ = 5119400.

The previous prime is 11381011. The next prime is 11381023. The reversal of 11381018 is 81018311.

11381018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 11380984 and 11381002.

It is not an unprimeable number, because it can be changed into a prime (11381011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31523 + ... + 31881.

It is an arithmetic number, because the mean of its divisors is an integer number (790020).

Almost surely, 2^11381018 is an apocalyptic number.

11381018 is a deficient number, since it is larger than the sum of its proper divisors (7579462).

11381018 is a wasteful number, since it uses less digits than its factorization.

11381018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 23.

The square root of 11381018 is about 3373.5764405153. The cubic root of 11381018 is about 224.9367262410.

Adding to 11381018 its reverse (81018311), we get a palindrome (92399329).

The spelling of 11381018 in words is "eleven million, three hundred eighty-one thousand, eighteen".