22899821 has 8 divisors (see below), whose sum is σ = 27073920. Its totient is φ = 18951408.

The previous prime is 22899803. The next prime is 22899823. The reversal of 22899821 is 12899822.

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

It is not a de Polignac number, because 22899821 - 2⁶ = 22899757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22899823) 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, 56201 + ... + 56606.

It is an arithmetic number, because the mean of its divisors is an integer number (3384240).

Almost surely, 2^22899821 is an apocalyptic number.

It is an amenable number.

22899821 is a deficient number, since it is larger than the sum of its proper divisors (4174099).

22899821 is a wasteful number, since it uses less digits than its factorization.

22899821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112843.

The product of its digits is 41472, while the sum is 41.

The square root of 22899821 is about 4785.3757428231. The cubic root of 22899821 is about 283.9732046729.

Subtracting from 22899821 its reverse (12899822), we obtain a palindrome (9999999).

The spelling of 22899821 in words is "twenty-two million, eight hundred ninety-nine thousand, eight hundred twenty-one".