22849921 has 4 divisors (see below), whose sum is σ = 24194052. Its totient is φ = 21505792.

The previous prime is 22849919. The next prime is 22849927. The reversal of 22849921 is 12994822.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17943696 + 4906225 = 4236^2 + 2215^2 .

It is a cyclic number.

It is not a de Polignac number, because 22849921 - 2¹ = 22849919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22849927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 672040 + ... + 672073.

It is an arithmetic number, because the mean of its divisors is an integer number (6048513).

Almost surely, 2^22849921 is an apocalyptic number.

It is an amenable number.

22849921 is a deficient number, since it is larger than the sum of its proper divisors (1344131).

22849921 is a wasteful number, since it uses less digits than its factorization.

22849921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344130.

The product of its digits is 20736, while the sum is 37.

The square root of 22849921 is about 4780.1590977707. The cubic root of 22849921 is about 283.7667901338.

The spelling of 22849921 in words is "twenty-two million, eight hundred forty-nine thousand, nine hundred twenty-one".