22009481 has 8 divisors (see below), whose sum is σ = 23890944. Its totient is φ = 20154960.

The previous prime is 22009457. The next prime is 22009483. The reversal of 22009481 is 18490022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22009481 - 2⁶ = 22009417 is a prime.

It is a super-2 number, since 2×22009481² = 968834507778722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22009481.

It is not an unprimeable number, because it can be changed into a prime (22009483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5015 + ... + 8316.

It is an arithmetic number, because the mean of its divisors is an integer number (2986368).

Almost surely, 2^22009481 is an apocalyptic number.

It is an amenable number.

22009481 is a deficient number, since it is larger than the sum of its proper divisors (1881463).

22009481 is a wasteful number, since it uses less digits than its factorization.

22009481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13471.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 22009481 is about 4691.4263289537. The cubic root of 22009481 is about 280.2441790042.

The spelling of 22009481 in words is "twenty-two million, nine thousand, four hundred eighty-one".