20426744 has 32 divisors (see below), whose sum is σ = 41958000. Its totient is φ = 9265152.

The previous prime is 20426743. The next prime is 20426761. The reversal of 20426744 is 44762402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20426743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4472 + ... + 7800.

Almost surely, 2^20426744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20426744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20979000).

20426744 is an abundant number, since it is smaller than the sum of its proper divisors (21531256).

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

20426744 is a wasteful number, since it uses less digits than its factorization.

20426744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3407 (or 3403 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 29.

The square root of 20426744 is about 4519.5955571268. The cubic root of 20426744 is about 273.3587933188.

The spelling of 20426744 in words is "twenty million, four hundred twenty-six thousand, seven hundred forty-four".