20426844 has 12 divisors (see below), whose sum is σ = 47662664. Its totient is φ = 6808944.

The previous prime is 20426839. The next prime is 20426851. The reversal of 20426844 is 44862402.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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, 851107 + ... + 851130.

Almost surely, 2^20426844 is an apocalyptic number.

It is an amenable number.

20426844 is an abundant number, since it is smaller than the sum of its proper divisors (27235820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20426844 is a wasteful number, since it uses less digits than its factorization.

20426844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702244 (or 1702242 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

The square root of 20426844 is about 4519.6066200500. The cubic root of 20426844 is about 273.3592393980.

The spelling of 20426844 in words is "twenty million, four hundred twenty-six thousand, eight hundred forty-four".