11421518 has 16 divisors (see below), whose sum is σ = 18440784. Its totient is φ = 5285760.

The previous prime is 11421511. The next prime is 11421523. The reversal of 11421518 is 81512411.

It is a junction number, because it is equal to n+sod(n) for n = 11421493 and 11421502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11421511) 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 7 ways as a sum of consecutive naturals, for example, 680 + ... + 4827.

It is an arithmetic number, because the mean of its divisors is an integer number (1152549).

Almost surely, 2^11421518 is an apocalyptic number.

11421518 is a deficient number, since it is larger than the sum of its proper divisors (7019266).

11421518 is a wasteful number, since it uses less digits than its factorization.

11421518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5587.

The product of its digits is 320, while the sum is 23.

The square root of 11421518 is about 3379.5736417483. The cubic root of 11421518 is about 225.2032270832.

Adding to 11421518 its reverse (81512411), we get a palindrome (92933929).

The spelling of 11421518 in words is "eleven million, four hundred twenty-one thousand, five hundred eighteen".