22146421 has 8 divisors (see below), whose sum is σ = 24616224. Its totient is φ = 19752720.

The previous prime is 22146413. The next prime is 22146433. The reversal of 22146421 is 12464122.

It is a happy number.

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 22146421 - 2³ = 22146413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22146392 and 22146401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22146451) 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, 18411 + ... + 19576.

It is an arithmetic number, because the mean of its divisors is an integer number (3077028).

Almost surely, 2^22146421 is an apocalyptic number.

It is an amenable number.

22146421 is a deficient number, since it is larger than the sum of its proper divisors (2469803).

22146421 is a wasteful number, since it uses less digits than its factorization.

22146421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38051.

The product of its digits is 768, while the sum is 22.

The square root of 22146421 is about 4705.9984062896. The cubic root of 22146421 is about 280.8241914762.

The spelling of 22146421 in words is "twenty-two million, one hundred forty-six thousand, four hundred twenty-one".