11381418 has 32 divisors (see below), whose sum is σ = 26625600. Its totient is φ = 3593808.

The previous prime is 11381413. The next prime is 11381423. The reversal of 11381418 is 81418311.

It is an interprime number because it is at equal distance from previous prime (11381413) and next prime (11381423).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11381391 and 11381400.

It is not an unprimeable number, because it can be changed into a prime (11381413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4521 + ... + 6572.

It is an arithmetic number, because the mean of its divisors is an integer number (832050).

Almost surely, 2^11381418 is an apocalyptic number.

11381418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11381418 is an abundant number, since it is smaller than the sum of its proper divisors (15244182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11381418 is a wasteful number, since it uses less digits than its factorization.

11381418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11123 (or 11117 counting only the distinct ones).

The product of its digits is 768, while the sum is 27.

The square root of 11381418 is about 3373.6357242595. The cubic root of 11381418 is about 224.9393614369.

Adding to 11381418 its reverse (81418311), we get a palindrome (92799729).

It can be divided in two parts, 1138 and 1418, that added together give a triangular number (2556 = T₇₁).

The spelling of 11381418 in words is "eleven million, three hundred eighty-one thousand, four hundred eighteen".