22621873 has 4 divisors (see below), whose sum is σ = 23173668. Its totient is φ = 22070080.

The previous prime is 22621871. The next prime is 22621891. The reversal of 22621873 is 37812622.

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 5049009 + 17572864 = 2247^2 + 4192^2 .

It is a cyclic number.

It is not a de Polignac number, because 22621873 - 2¹ = 22621871 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22621871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275836 + ... + 275917.

It is an arithmetic number, because the mean of its divisors is an integer number (5793417).

Almost surely, 2^22621873 is an apocalyptic number.

It is an amenable number.

22621873 is a deficient number, since it is larger than the sum of its proper divisors (551795).

22621873 is an equidigital number, since it uses as much as digits as its factorization.

22621873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551794.

The product of its digits is 8064, while the sum is 31.

The square root of 22621873 is about 4756.2456833095. The cubic root of 22621873 is about 282.8196105962.

The spelling of 22621873 in words is "twenty-two million, six hundred twenty-one thousand, eight hundred seventy-three".