22421518 has 24 divisors (see below), whose sum is σ = 39501000. Its totient is φ = 9516528.

The previous prime is 22421513. The next prime is 22421551. The reversal of 22421518 is 81512422.

It is a junction number, because it is equal to n+sod(n) for n = 22421492 and 22421501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22421513) 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, 9633 + ... + 11731.

It is an arithmetic number, because the mean of its divisors is an integer number (1645875).

Almost surely, 2^22421518 is an apocalyptic number.

22421518 is a deficient number, since it is larger than the sum of its proper divisors (17079482).

22421518 is a wasteful number, since it uses less digits than its factorization.

22421518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224 (or 2217 counting only the distinct ones).

The product of its digits is 1280, while the sum is 25.

The square root of 22421518 is about 4735.1365344623. The cubic root of 22421518 is about 281.9821845459.

The spelling of 22421518 in words is "twenty-two million, four hundred twenty-one thousand, five hundred eighteen".