21845626 has 8 divisors (see below), whose sum is σ = 35747424. Its totient is φ = 9929820.

The previous prime is 21845597. The next prime is 21845627. The reversal of 21845626 is 62654812.

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

It is a junction number, because it is equal to n+sod(n) for n = 21845591 and 21845600.

It is not an unprimeable number, because it can be changed into a prime (21845627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 496470 + ... + 496513.

It is an arithmetic number, because the mean of its divisors is an integer number (4468428).

Almost surely, 2^21845626 is an apocalyptic number.

21845626 is a deficient number, since it is larger than the sum of its proper divisors (13901798).

21845626 is a wasteful number, since it uses less digits than its factorization.

21845626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992996.

The product of its digits is 23040, while the sum is 34.

The square root of 21845626 is about 4673.9304658927. The cubic root of 21845626 is about 279.5469970884.

The spelling of 21845626 in words is "twenty-one million, eight hundred forty-five thousand, six hundred twenty-six".