22606421 has 4 divisors (see below), whose sum is σ = 22916172. Its totient is φ = 22296672.

The previous prime is 22606391. The next prime is 22606427. The reversal of 22606421 is 12460622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12460622 = 2 ⋅6230311.

It can be written as a sum of positive squares in 2 ways, for example, as 6916900 + 15689521 = 2630^2 + 3961^2 .

It is a cyclic number.

It is not a de Polignac number, because 22606421 - 2¹⁴ = 22590037 is a prime.

It is a super-2 number, since 2×22606421² = 1022100540858482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22606427) 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, 154766 + ... + 154911.

It is an arithmetic number, because the mean of its divisors is an integer number (5729043).

Almost surely, 2^22606421 is an apocalyptic number.

It is an amenable number.

22606421 is a deficient number, since it is larger than the sum of its proper divisors (309751).

22606421 is an equidigital number, since it uses as much as digits as its factorization.

22606421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309750.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 22606421 is about 4754.6210153912. The cubic root of 22606421 is about 282.7552020772.

The spelling of 22606421 in words is "twenty-two million, six hundred six thousand, four hundred twenty-one".